79864481 has 4 divisors (see below), whose sum is σ = 81371412. Its totient is φ = 78357552.

The previous prime is 79864457. The next prime is 79864501. The reversal of 79864481 is 18446897.

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 63744256 + 16120225 = 7984^2 + 4015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79864481 is a prime.

It is a super-2 number, since 2×79864481² = 12756670650798722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79864381) 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, 753386 + ... + 753491.

It is an arithmetic number, because the mean of its divisors is an integer number (20342853).

Almost surely, 2^79864481 is an apocalyptic number.

It is an amenable number.

79864481 is a deficient number, since it is larger than the sum of its proper divisors (1506931).

79864481 is a wasteful number, since it uses less digits than its factorization.

79864481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506930.

The product of its digits is 387072, while the sum is 47.

The square root of 79864481 is about 8936.6929565696. The cubic root of 79864481 is about 430.6434947957.

The spelling of 79864481 in words is "seventy-nine million, eight hundred sixty-four thousand, four hundred eighty-one".