72998907 has 16 divisors (see below), whose sum is σ = 100201728. Its totient is φ = 47244960.

The previous prime is 72998897. The next prime is 72998909. The reversal of 72998907 is 70989927.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-72998907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72998907.

It is not an unprimeable number, because it can be changed into a prime (72998909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20682 + ... + 23952.

It is an arithmetic number, because the mean of its divisors is an integer number (6262608).

Almost surely, 2^72998907 is an apocalyptic number.

72998907 is a deficient number, since it is larger than the sum of its proper divisors (27202821).

72998907 is a wasteful number, since it uses less digits than its factorization.

72998907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 72998907 is about 8543.9397820912. The cubic root of 72998907 is about 417.9318337749.

The spelling of 72998907 in words is "seventy-two million, nine hundred ninety-eight thousand, nine hundred seven".