72311087 has 4 divisors (see below), whose sum is σ = 72546936. Its totient is φ = 72075240.

The previous prime is 72311069. The next prime is 72311119. The reversal of 72311087 is 78011327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78011327 = 1151 ⋅67777.

It is a cyclic number.

It is not a de Polignac number, because 72311087 - 2⁸ = 72310831 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 (72310087) 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, 117464 + ... + 118077.

It is an arithmetic number, because the mean of its divisors is an integer number (18136734).

Almost surely, 2^72311087 is an apocalyptic number.

72311087 is a deficient number, since it is larger than the sum of its proper divisors (235849).

72311087 is a wasteful number, since it uses less digits than its factorization.

72311087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235848.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 72311087 is about 8503.5925937218. The cubic root of 72311087 is about 416.6150584259.

The spelling of 72311087 in words is "seventy-two million, three hundred eleven thousand, eighty-seven".