72591953 has 4 divisors (see below), whose sum is σ = 82962240. Its totient is φ = 62221668.

The previous prime is 72591943. The next prime is 72591973. The reversal of 72591953 is 35919527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72591953 - 2¹² = 72587857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72591953.

It is not an unprimeable number, because it can be changed into a prime (72591943) 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, 5185133 + ... + 5185146.

It is an arithmetic number, because the mean of its divisors is an integer number (20740560).

Almost surely, 2^72591953 is an apocalyptic number.

It is an amenable number.

72591953 is a deficient number, since it is larger than the sum of its proper divisors (10370287).

72591953 is a wasteful number, since it uses less digits than its factorization.

72591953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370286.

The product of its digits is 85050, while the sum is 41.

The square root of 72591953 is about 8520.0911380102. The cubic root of 72591953 is about 417.1537578970.

The spelling of 72591953 in words is "seventy-two million, five hundred ninety-one thousand, nine hundred fifty-three".