79770137 has 4 divisors (see below), whose sum is σ = 84462516. Its totient is φ = 75077760.

The previous prime is 79770121. The next prime is 79770143. The reversal of 79770137 is 73107797.

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 50922496 + 28847641 = 7136^2 + 5371^2 .

It is a cyclic number.

It is not a de Polignac number, because 79770137 - 2⁴ = 79770121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79770094 and 79770103.

It is not an unprimeable number, because it can be changed into a prime (79770107) 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, 2346164 + ... + 2346197.

It is an arithmetic number, because the mean of its divisors is an integer number (21115629).

Almost surely, 2^79770137 is an apocalyptic number.

It is an amenable number.

79770137 is a deficient number, since it is larger than the sum of its proper divisors (4692379).

79770137 is a wasteful number, since it uses less digits than its factorization.

79770137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692378.

The product of its (nonzero) digits is 64827, while the sum is 41.

The square root of 79770137 is about 8931.4129341331. The cubic root of 79770137 is about 430.4738547668.

The spelling of 79770137 in words is "seventy-nine million, seven hundred seventy thousand, one hundred thirty-seven".