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79943000977 = 7531992414493
BaseRepresentation
bin100101001110011111…
…0010110001110010001
321122100100212020001001
41022130332112032101
52302210402012402
6100420355542001
75530030203460
oct1123476261621
9248310766031
1079943000977
11309a3815954
12135b08ba901
137700398a98
143c2537c9d7
15212d4b0187
hex129cf96391

79943000977 has 32 divisors (see below), whose sum is σ = 93964147200. Its totient is φ = 66599470080.

The previous prime is 79943000957. The next prime is 79943000981. The reversal of 79943000977 is 77900034997.

It is a cyclic number.

It is not a de Polignac number, because 79943000977 - 211 = 79942998929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79943000957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17790543 + ... + 17795035.

It is an arithmetic number, because the mean of its divisors is an integer number (2936379600).

Almost surely, 279943000977 is an apocalyptic number.

79943000977 is the 178822-nd heptagonal number.

It is an amenable number.

79943000977 is a deficient number, since it is larger than the sum of its proper divisors (14021146223).

79943000977 is a wasteful number, since it uses less digits than its factorization.

79943000977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4993.

The product of its (nonzero) digits is 3000564, while the sum is 55.

The spelling of 79943000977 in words is "seventy-nine billion, nine hundred forty-three million, nine hundred seventy-seven", and thus it is an aban number.

Divisors: 1 7 53 199 241 371 1393 1687 4493 10547 12773 31451 47959 73829 89411 238129 335713 894107 1082813 1666903 2541827 6258749 7579691 17792789 47387671 57389089 215479787 331713697 401723623 1508358509 11420428711 79943000977