72990373 has 4 divisors (see below), whose sum is σ = 74770668. Its totient is φ = 71210080.

The previous prime is 72990349. The next prime is 72990383. The reversal of 72990373 is 37309927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37309927 = 1153 ⋅32359.

It can be written as a sum of positive squares in 2 ways, for example, as 41383489 + 31606884 = 6433^2 + 5622^2 .

It is a cyclic number.

It is not a de Polignac number, because 72990373 - 2⁵ = 72990341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72990383) 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, 890086 + ... + 890167.

It is an arithmetic number, because the mean of its divisors is an integer number (18692667).

Almost surely, 2^72990373 is an apocalyptic number.

It is an amenable number.

72990373 is a deficient number, since it is larger than the sum of its proper divisors (1780295).

72990373 is a wasteful number, since it uses less digits than its factorization.

72990373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780294.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 72990373 is about 8543.4403491802. The cubic root of 72990373 is about 417.9155469134.

The spelling of 72990373 in words is "seventy-two million, nine hundred ninety thousand, three hundred seventy-three".