72999130 has 16 divisors (see below), whose sum is σ = 132563304. Its totient is φ = 28940800.

The previous prime is 72999109. The next prime is 72999137. The reversal of 72999130 is 3199927.

It can be written as a sum of positive squares in 4 ways, for example, as 52722121 + 20277009 = 7261^2 + 4503^2 .

It is not an unprimeable number, because it can be changed into a prime (72999137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31171 + ... + 33430.

Almost surely, 2^72999130 is an apocalyptic number.

72999130 is a deficient number, since it is larger than the sum of its proper divisors (59564174).

72999130 is a wasteful number, since it uses less digits than its factorization.

72999130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64721.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 72999130 is about 8543.9528322668. The cubic root of 72999130 is about 417.9322593461.

The spelling of 72999130 in words is "seventy-two million, nine hundred ninety-nine thousand, one hundred thirty".