72563457 has 4 divisors (see below), whose sum is σ = 96751280. Its totient is φ = 48375636.

The previous prime is 72563431. The next prime is 72563471. The reversal of 72563457 is 75436527.

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 not a de Polignac number, because 72563457 - 2⁷ = 72563329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72523457) 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, 12093907 + ... + 12093912.

It is an arithmetic number, because the mean of its divisors is an integer number (24187820).

Almost surely, 2^72563457 is an apocalyptic number.

It is an amenable number.

72563457 is a deficient number, since it is larger than the sum of its proper divisors (24187823).

72563457 is a wasteful number, since it uses less digits than its factorization.

72563457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24187822.

The product of its digits is 176400, while the sum is 39.

The square root of 72563457 is about 8518.4186912830. The cubic root of 72563457 is about 417.0991661286.

The spelling of 72563457 in words is "seventy-two million, five hundred sixty-three thousand, four hundred fifty-seven".