72150091 has 16 divisors (see below), whose sum is σ = 82905984. Its totient is φ = 62198784.

The previous prime is 72150083. The next prime is 72150101. The reversal of 72150091 is 19005127.

It is not a de Polignac number, because 72150091 - 2³ = 72150083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72150191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29086 + ... + 31468.

It is an arithmetic number, because the mean of its divisors is an integer number (5181624).

Almost surely, 2^72150091 is an apocalyptic number.

72150091 is a deficient number, since it is larger than the sum of its proper divisors (10755893).

72150091 is a wasteful number, since it uses less digits than its factorization.

72150091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 72150091 is about 8494.1209668806. The cubic root of 72150091 is about 416.3056397711.

The spelling of 72150091 in words is "seventy-two million, one hundred fifty thousand, ninety-one".