72575891 has 4 divisors (see below), whose sum is σ = 72616632. Its totient is φ = 72535152.

The previous prime is 72575869. The next prime is 72575917. The reversal of 72575891 is 19857527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72575891 - 2⁶ = 72575827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72575831) 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, 17570 + ... + 21303.

It is an arithmetic number, because the mean of its divisors is an integer number (18154158).

Almost surely, 2^72575891 is an apocalyptic number.

72575891 is a deficient number, since it is larger than the sum of its proper divisors (40741).

72575891 is a wasteful number, since it uses less digits than its factorization.

72575891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40740.

The product of its digits is 176400, while the sum is 44.

The square root of 72575891 is about 8519.1484903129. The cubic root of 72575891 is about 417.1229885641.

The spelling of 72575891 in words is "seventy-two million, five hundred seventy-five thousand, eight hundred ninety-one".