72606687 has 4 divisors (see below), whose sum is σ = 96808920. Its totient is φ = 48404456.

The previous prime is 72606637. The next prime is 72606697. The reversal of 72606687 is 78660627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72606687 - 2⁶ = 72606623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72606637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12101112 + ... + 12101117.

It is an arithmetic number, because the mean of its divisors is an integer number (24202230).

Almost surely, 2^72606687 is an apocalyptic number.

72606687 is a deficient number, since it is larger than the sum of its proper divisors (24202233).

72606687 is a wasteful number, since it uses less digits than its factorization.

72606687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24202232.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 72606687 is about 8520.9557562518. The cubic root of 72606687 is about 417.1819792421.

The spelling of 72606687 in words is "seventy-two million, six hundred six thousand, six hundred eighty-seven".