72644627 has 4 divisors (see below), whose sum is σ = 79248696. Its totient is φ = 66040560.

The previous prime is 72644599. The next prime is 72644633.

72644627 is nontrivially palindromic in base 10.

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 72644627 - 2¹² = 72640531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72644647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3302018 + ... + 3302039.

It is an arithmetic number, because the mean of its divisors is an integer number (19812174).

Almost surely, 2^72644627 is an apocalyptic number.

72644627 is a deficient number, since it is larger than the sum of its proper divisors (6604069).

72644627 is a wasteful number, since it uses less digits than its factorization.

72644627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6604068.

The product of its digits is 112896, while the sum is 38.

The square root of 72644627 is about 8523.1817415798. The cubic root of 72644627 is about 417.2546315411.

The spelling of 72644627 in words is "seventy-two million, six hundred forty-four thousand, six hundred twenty-seven".