72134087 has 4 divisors (see below), whose sum is σ = 72251616. Its totient is φ = 72016560.

The previous prime is 72134081. The next prime is 72134119. The reversal of 72134087 is 78043127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78043127 = 19 ⋅4107533.

It is a cyclic number.

It is not a de Polignac number, because 72134087 - 2²² = 67939783 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 (72134081) 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, 57839 + ... + 59072.

It is an arithmetic number, because the mean of its divisors is an integer number (18062904).

Almost surely, 2^72134087 is an apocalyptic number.

72134087 is a deficient number, since it is larger than the sum of its proper divisors (117529).

72134087 is a wasteful number, since it uses less digits than its factorization.

72134087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117528.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 72134087 is about 8493.1788512900. The cubic root of 72134087 is about 416.2748564968.

The spelling of 72134087 in words is "seventy-two million, one hundred thirty-four thousand, eighty-seven".