79770613 has 8 divisors (see below), whose sum is σ = 90960408. Its totient is φ = 69302784.

The previous prime is 79770599. The next prime is 79770637. The reversal of 79770613 is 31607797.

It can be written as a sum of positive squares in 4 ways, for example, as 19909444 + 59861169 = 4462^2 + 7737^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79770613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79770653) 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, 180256 + ... + 180697.

It is an arithmetic number, because the mean of its divisors is an integer number (11370051).

Almost surely, 2^79770613 is an apocalyptic number.

It is an amenable number.

79770613 is a deficient number, since it is larger than the sum of its proper divisors (11189795).

79770613 is a wasteful number, since it uses less digits than its factorization.

79770613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360983.

The product of its (nonzero) digits is 55566, while the sum is 40.

The square root of 79770613 is about 8931.4395816128. The cubic root of 79770613 is about 430.4747109984.

The spelling of 79770613 in words is "seventy-nine million, seven hundred seventy thousand, six hundred thirteen".