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99979 = 1161149
BaseRepresentation
bin11000011010001011
312002010221
4120122023
511144404
62050511
7564325
oct303213
9162127
1099979
1169130
1249a37
1336679
1428615
151e954
hex1868b

99979 has 8 divisors (see below), whose sum is σ = 111600. Its totient is φ = 88800.

The previous prime is 99971. The next prime is 99989. The reversal of 99979 is 97999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99979 - 23 = 99971 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (99971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597 + ... + 745.

It is an arithmetic number, because the mean of its divisors is an integer number (13950).

299979 is an apocalyptic number.

99979 is a deficient number, since it is larger than the sum of its proper divisors (11621).

99979 is a wasteful number, since it uses less digits than its factorization.

99979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221.

The product of its digits is 45927, while the sum is 43.

The square root of 99979 is about 316.1945603580. The cubic root of 99979 is about 46.4126389965.

The spelling of 99979 in words is "ninety-nine thousand, nine hundred seventy-nine".

Divisors: 1 11 61 149 671 1639 9089 99979