72967989 has 4 divisors (see below), whose sum is σ = 97290656. Its totient is φ = 48645324.

The previous prime is 72967969. The next prime is 72968009. The reversal of 72967989 is 98976927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (72967969) and next prime (72968009).

It is not a de Polignac number, because 72967989 - 2¹² = 72963893 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 (72967919) 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, 12161329 + ... + 12161334.

It is an arithmetic number, because the mean of its divisors is an integer number (24322664).

Almost surely, 2^72967989 is an apocalyptic number.

It is an amenable number.

72967989 is a deficient number, since it is larger than the sum of its proper divisors (24322667).

72967989 is a wasteful number, since it uses less digits than its factorization.

72967989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24322666.

The product of its digits is 3429216, while the sum is 57.

The square root of 72967989 is about 8542.1302378271. The cubic root of 72967989 is about 417.8728217445.

The spelling of 72967989 in words is "seventy-two million, nine hundred sixty-seven thousand, nine hundred eighty-nine".