79581945 has 32 divisors (see below), whose sum is σ = 132969600. Its totient is φ = 40592384.

The previous prime is 79581941. The next prime is 79581967. The reversal of 79581945 is 54918597.

It is a cyclic number.

It is not a de Polignac number, because 79581945 - 2² = 79581941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79581894 and 79581903.

It is not an unprimeable number, because it can be changed into a prime (79581941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48346 + ... + 49964.

It is an arithmetic number, because the mean of its divisors is an integer number (4155300).

Almost surely, 2^79581945 is an apocalyptic number.

It is an amenable number.

79581945 is a deficient number, since it is larger than the sum of its proper divisors (53387655).

79581945 is a wasteful number, since it uses less digits than its factorization.

79581945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769.

The product of its digits is 453600, while the sum is 48.

The square root of 79581945 is about 8920.8713139469. The cubic root of 79581945 is about 430.1350666379.

The spelling of 79581945 in words is "seventy-nine million, five hundred eighty-one thousand, nine hundred forty-five".