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80853877 = 1371251349
BaseRepresentation
bin1001101000110…
…11101101110101
312122010210200001
410310123231311
5131144311002
612004551301
72001150406
oct464335565
9178123601
1080853877
1141704795
12230b2531
131399bc40
14aa499ad
157171a87
hex4d1bb75

80853877 has 16 divisors (see below), whose sum is σ = 88905600. Its totient is φ = 73080000.

The previous prime is 80853823. The next prime is 80853881. The reversal of 80853877 is 77835808.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-80853877 is a prime.

It is a super-2 number, since 2×808538772 = 13074698851862258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80853077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231499 + ... + 231847.

It is an arithmetic number, because the mean of its divisors is an integer number (5556600).

Almost surely, 280853877 is an apocalyptic number.

It is an amenable number.

80853877 is a deficient number, since it is larger than the sum of its proper divisors (8051723).

80853877 is a wasteful number, since it uses less digits than its factorization.

80853877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 80853877 is about 8991.8783910816. The cubic root of 80853877 is about 432.4145344394.

The spelling of 80853877 in words is "eighty million, eight hundred fifty-three thousand, eight hundred seventy-seven".

Divisors: 1 13 71 251 349 923 3263 4537 17821 24779 87599 231673 322127 1138787 6219529 80853877