79688945 has 72 divisors (see below), whose sum is σ = 126653544. Its totient is φ = 47803392.

The previous prime is 79688867. The next prime is 79688957. The reversal of 79688945 is 54988697.

It can be written as a sum of positive squares in 4 ways, for example, as 24216241 + 55472704 = 4921^2 + 7448^2 .

It is not a de Polignac number, because 79688945 - 2¹⁶ = 79623409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1503539 + ... + 1503591.

It is an arithmetic number, because the mean of its divisors is an integer number (1759077).

Almost surely, 2^79688945 is an apocalyptic number.

It is an amenable number.

79688945 is a deficient number, since it is larger than the sum of its proper divisors (46964599).

79688945 is a wasteful number, since it uses less digits than its factorization.

79688945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 101 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 56.

The square root of 79688945 is about 8926.8664715005. The cubic root of 79688945 is about 430.3277562424.

The spelling of 79688945 in words is "seventy-nine million, six hundred eighty-eight thousand, nine hundred forty-five".