72990523 has 16 divisors (see below), whose sum is σ = 79220736. Its totient is φ = 67050720.

The previous prime is 72990521. The next prime is 72990557. The reversal of 72990523 is 32509927.

It is a cyclic number.

It is not a de Polignac number, because 72990523 - 2¹ = 72990521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72990521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118765 + ... + 119377.

It is an arithmetic number, because the mean of its divisors is an integer number (4951296).

Almost surely, 2^72990523 is an apocalyptic number.

72990523 is a deficient number, since it is larger than the sum of its proper divisors (6230213).

72990523 is a wasteful number, since it uses less digits than its factorization.

72990523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 72990523 is about 8543.4491278406. The cubic root of 72990523 is about 417.9158331944.

The spelling of 72990523 in words is "seventy-two million, nine hundred ninety thousand, five hundred twenty-three".