79690717 has 4 divisors (see below), whose sum is σ = 80479836. Its totient is φ = 78901600.

The previous prime is 79690687. The next prime is 79690729. The reversal of 79690717 is 71709697.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72352036 + 7338681 = 8506^2 + 2709^2 .

It is a cyclic number.

It is not a de Polignac number, because 79690717 - 2¹⁹ = 79166429 is a prime.

It is a super-2 number, since 2×79690717² = 12701220751948178, 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 (79690777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394408 + ... + 394609.

It is an arithmetic number, because the mean of its divisors is an integer number (20119959).

Almost surely, 2^79690717 is an apocalyptic number.

It is an amenable number.

79690717 is a deficient number, since it is larger than the sum of its proper divisors (789119).

79690717 is a wasteful number, since it uses less digits than its factorization.

79690717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789118.

The product of its (nonzero) digits is 166698, while the sum is 46.

The square root of 79690717 is about 8926.9657219013. The cubic root of 79690717 is about 430.3309458740.

The spelling of 79690717 in words is "seventy-nine million, six hundred ninety thousand, seven hundred seventeen".