72706879 has 4 divisors (see below), whose sum is σ = 83093584. Its totient is φ = 62320176.

The previous prime is 72706877. The next prime is 72706889. The reversal of 72706879 is 97860727.

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 72706879 - 2¹ = 72706877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72706871) 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, 5193342 + ... + 5193355.

It is an arithmetic number, because the mean of its divisors is an integer number (20773396).

Almost surely, 2^72706879 is an apocalyptic number.

72706879 is a deficient number, since it is larger than the sum of its proper divisors (10386705).

72706879 is a wasteful number, since it uses less digits than its factorization.

72706879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10386704.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 72706879 is about 8526.8328821433. The cubic root of 72706879 is about 417.3737847406.

The spelling of 72706879 in words is "seventy-two million, seven hundred six thousand, eight hundred seventy-nine".