72868745 has 4 divisors (see below), whose sum is σ = 87442500. Its totient is φ = 58294992.

The previous prime is 72868729. The next prime is 72868751. The reversal of 72868745 is 54786827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54786827 = 31 ⋅1767317.

It can be written as a sum of positive squares in 2 ways, for example, as 34762816 + 38105929 = 5896^2 + 6173^2 .

It is a cyclic number.

It is not a de Polignac number, because 72868745 - 2⁴ = 72868729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72868745.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7286870 + ... + 7286879.

It is an arithmetic number, because the mean of its divisors is an integer number (21860625).

Almost surely, 2^72868745 is an apocalyptic number.

It is an amenable number.

72868745 is a deficient number, since it is larger than the sum of its proper divisors (14573755).

72868745 is a wasteful number, since it uses less digits than its factorization.

72868745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14573754.

The product of its digits is 752640, while the sum is 47.

The square root of 72868745 is about 8536.3191716336. The cubic root of 72868745 is about 417.6832857261.

The spelling of 72868745 in words is "seventy-two million, eight hundred sixty-eight thousand, seven hundred forty-five".