79690 has 16 divisors (see below), whose sum is σ = 154728. Its totient is φ = 29376.

The previous prime is 79687. The next prime is 79691. The reversal of 79690 is 9697.

It can be written as a sum of positive squares in 4 ways, for example, as 21609 + 58081 = 147^2 + 241^2 .

It is a super-2 number, since 2×79690² = 12700992200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79691) 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, 177 + ... + 436.

2⁷⁹⁶⁹⁰ is an apocalyptic number.

79690 is a deficient number, since it is larger than the sum of its proper divisors (75038).

79690 is a wasteful number, since it uses less digits than its factorization.

79690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 79690 is about 282.2941728056. The cubic root of 79690 is about 43.0329655267.

The spelling of 79690 in words is "seventy-nine thousand, six hundred ninety".