72190057 has 4 divisors (see below), whose sum is σ = 72334080. Its totient is φ = 72046036.

The previous prime is 72190049. The next prime is 72190091. The reversal of 72190057 is 75009127.

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 72190057 - 2³ = 72190049 is a prime.

It is a super-2 number, since 2×72190057² = 10422808659326498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72191057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71257 + ... + 72262.

It is an arithmetic number, because the mean of its divisors is an integer number (18083520).

Almost surely, 2^72190057 is an apocalyptic number.

It is an amenable number.

72190057 is a deficient number, since it is larger than the sum of its proper divisors (144023).

72190057 is a wasteful number, since it uses less digits than its factorization.

72190057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144022.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 72190057 is about 8496.4732095146. The cubic root of 72190057 is about 416.3824934512.

The spelling of 72190057 in words is "seventy-two million, one hundred ninety thousand, fifty-seven".