816079937 has 4 divisors (see below), whose sum is σ = 819582660. Its totient is φ = 812577216.

The previous prime is 816079903. The next prime is 816079939. The reversal of 816079937 is 739970618.

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 258695056 + 557384881 = 16084^2 + 23609^2 .

It is a cyclic number.

It is not a de Polignac number, because 816079937 - 2²⁶ = 748971073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816079939) 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, 1751012 + ... + 1751477.

It is an arithmetic number, because the mean of its divisors is an integer number (204895665).

Almost surely, 2^816079937 is an apocalyptic number.

It is an amenable number.

816079937 is a deficient number, since it is larger than the sum of its proper divisors (3502723).

816079937 is a wasteful number, since it uses less digits than its factorization.

816079937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3502722.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 816079937 is about 28567.1128572700. The cubic root of 816079937 is about 934.4962587222.

The spelling of 816079937 in words is "eight hundred sixteen million, seventy-nine thousand, nine hundred thirty-seven".