72706951 has 4 divisors (see below), whose sum is σ = 73019232. Its totient is φ = 72394672.

The previous prime is 72706927. The next prime is 72706967. The reversal of 72706951 is 15960727.

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 72706951 - 2²³ = 64318343 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 72706951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72700951) 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, 155791 + ... + 156256.

It is an arithmetic number, because the mean of its divisors is an integer number (18254808).

Almost surely, 2^72706951 is an apocalyptic number.

72706951 is a deficient number, since it is larger than the sum of its proper divisors (312281).

72706951 is a wasteful number, since it uses less digits than its factorization.

72706951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312280.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 72706951 is about 8526.8371041084. The cubic root of 72706951 is about 417.3739225125.

The spelling of 72706951 in words is "seventy-two million, seven hundred six thousand, nine hundred fifty-one".