72549775 has 12 divisors (see below), whose sum is σ = 90208512. Its totient is φ = 57880640.

The previous prime is 72549773. The next prime is 72549779. The reversal of 72549775 is 57794527.

It is not a de Polignac number, because 72549775 - 2¹ = 72549773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72549773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5787 + ... + 13363.

It is an arithmetic number, because the mean of its divisors is an integer number (7517376).

Almost surely, 2^72549775 is an apocalyptic number.

72549775 is a deficient number, since it is larger than the sum of its proper divisors (17658737).

72549775 is a wasteful number, since it uses less digits than its factorization.

72549775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7970 (or 7965 counting only the distinct ones).

The product of its digits is 617400, while the sum is 46.

The square root of 72549775 is about 8517.6155700994. The cubic root of 72549775 is about 417.0729494913.

The spelling of 72549775 in words is "seventy-two million, five hundred forty-nine thousand, seven hundred seventy-five".