72549887 has 4 divisors (see below), whose sum is σ = 73468320. Its totient is φ = 71631456.

The previous prime is 72549877. The next prime is 72549899. The reversal of 72549887 is 78894527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78894527 = 109 ⋅723803.

It is a cyclic number.

It is not a de Polignac number, because 72549887 - 2¹⁰ = 72548863 is a prime.

It is a super-2 number, since 2×72549887² = 10526972207425538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72549817) 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, 459098 + ... + 459255.

It is an arithmetic number, because the mean of its divisors is an integer number (18367080).

Almost surely, 2^72549887 is an apocalyptic number.

72549887 is a deficient number, since it is larger than the sum of its proper divisors (918433).

72549887 is an equidigital number, since it uses as much as digits as its factorization.

72549887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918432.

The product of its digits is 1128960, while the sum is 50.

The square root of 72549887 is about 8517.6221447068. The cubic root of 72549887 is about 417.0731641124.

The spelling of 72549887 in words is "seventy-two million, five hundred forty-nine thousand, eight hundred eighty-seven".