72136487 has 8 divisors (see below), whose sum is σ = 75411456. Its totient is φ = 68873112.

The previous prime is 72136459. The next prime is 72136517. The reversal of 72136487 is 78463127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72136487 - 2⁸ = 72136231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72136487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72136447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11378 + ... + 16544.

It is an arithmetic number, because the mean of its divisors is an integer number (9426432).

Almost surely, 2^72136487 is an apocalyptic number.

72136487 is a deficient number, since it is larger than the sum of its proper divisors (3274969).

72136487 is a wasteful number, since it uses less digits than its factorization.

72136487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5797.

The product of its digits is 56448, while the sum is 38.

The square root of 72136487 is about 8493.3201399688. The cubic root of 72136487 is about 416.2794731240.

The spelling of 72136487 in words is "seventy-two million, one hundred thirty-six thousand, four hundred eighty-seven".