72990001 has 16 divisors (see below), whose sum is σ = 89128960. Its totient is φ = 58378320.

The previous prime is 72989989. The next prime is 72990007. The reversal of 72990001 is 10009927.

It is not a de Polignac number, because 72990001 - 2²³ = 64601393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72990007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4816 + ... + 13006.

It is an arithmetic number, because the mean of its divisors is an integer number (5570560).

Almost surely, 2^72990001 is an apocalyptic number.

It is an amenable number.

72990001 is a deficient number, since it is larger than the sum of its proper divisors (16138959).

72990001 is a wasteful number, since it uses less digits than its factorization.

72990001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8284.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 72990001 is about 8543.4185780635. The cubic root of 72990001 is about 417.9148369346.

Adding to 72990001 its reverse (10009927), we get a palindrome (82999928).

The spelling of 72990001 in words is "seventy-two million, nine hundred ninety thousand, one".