72143577 has 12 divisors (see below), whose sum is σ = 113680944. Its totient is φ = 43723320.

The previous prime is 72143537. The next prime is 72143579. The reversal of 72143577 is 77534127.

72143577 is a `hidden beast` number, since 72 + 14 + 3 + 577 = 666.

It is not a de Polignac number, because 72143577 - 2⁸ = 72143321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72143579) 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 11 ways as a sum of consecutive naturals, for example, 364263 + ... + 364460.

It is an arithmetic number, because the mean of its divisors is an integer number (9473412).

Almost surely, 2^72143577 is an apocalyptic number.

It is an amenable number.

72143577 is a deficient number, since it is larger than the sum of its proper divisors (41537367).

72143577 is a wasteful number, since it uses less digits than its factorization.

72143577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728740 (or 728737 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 72143577 is about 8493.7375165471. The cubic root of 72143577 is about 416.2931108123.

The spelling of 72143577 in words is "seventy-two million, one hundred forty-three thousand, five hundred seventy-seven".