72500987 has 4 divisors (see below), whose sum is σ = 78078000. Its totient is φ = 66923976.

The previous prime is 72500983. The next prime is 72501041. The reversal of 72500987 is 78900527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78900527 = 8287 ⋅9521.

It is a cyclic number.

It is not a de Polignac number, because 72500987 - 2² = 72500983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72500987.

It is not an unprimeable number, because it can be changed into a prime (72500983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2788487 + ... + 2788512.

It is an arithmetic number, because the mean of its divisors is an integer number (19519500).

Almost surely, 2^72500987 is an apocalyptic number.

72500987 is a deficient number, since it is larger than the sum of its proper divisors (5577013).

72500987 is a wasteful number, since it uses less digits than its factorization.

72500987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577012.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 72500987 is about 8514.7511414016. The cubic root of 72500987 is about 416.9794379769.

The spelling of 72500987 in words is "seventy-two million, five hundred thousand, nine hundred eighty-seven".