72971959 has 4 divisors (see below), whose sum is σ = 73039816. Its totient is φ = 72904104.

The previous prime is 72971957. The next prime is 72971963. The reversal of 72971959 is 95917927.

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 72971959 - 2¹ = 72971957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72971953) 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, 32289 + ... + 34474.

It is an arithmetic number, because the mean of its divisors is an integer number (18259954).

Almost surely, 2^72971959 is an apocalyptic number.

72971959 is a deficient number, since it is larger than the sum of its proper divisors (67857).

72971959 is a wasteful number, since it uses less digits than its factorization.

72971959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67856.

The product of its digits is 357210, while the sum is 49.

The square root of 72971959 is about 8542.3626122988. The cubic root of 72971959 is about 417.8804000678.

The spelling of 72971959 in words is "seventy-two million, nine hundred seventy-one thousand, nine hundred fifty-nine".