79798815 has 12 divisors (see below), whose sum is σ = 138318024. Its totient is φ = 42559344.

The previous prime is 79798813. The next prime is 79798847. The reversal of 79798815 is 51889797.

It is not a de Polignac number, because 79798815 - 2¹ = 79798813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79798811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 886609 + ... + 886698.

It is an arithmetic number, because the mean of its divisors is an integer number (11526502).

Almost surely, 2^79798815 is an apocalyptic number.

79798815 is a deficient number, since it is larger than the sum of its proper divisors (58519209).

79798815 is a wasteful number, since it uses less digits than its factorization.

79798815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773318 (or 1773315 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 54.

The square root of 79798815 is about 8933.0182469309. The cubic root of 79798815 is about 430.5254348467.

The spelling of 79798815 in words is "seventy-nine million, seven hundred ninety-eight thousand, eight hundred fifteen".