72974817 has 16 divisors (see below), whose sum is σ = 111840000. Its totient is φ = 46971792.

The previous prime is 72974813. The next prime is 72974833. The reversal of 72974817 is 71847927.

It is a happy number.

It is not a de Polignac number, because 72974817 - 2² = 72974813 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72974813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45817 + ... + 47382.

It is an arithmetic number, because the mean of its divisors is an integer number (6990000).

Almost surely, 2^72974817 is an apocalyptic number.

It is an amenable number.

72974817 is a deficient number, since it is larger than the sum of its proper divisors (38865183).

72974817 is a wasteful number, since it uses less digits than its factorization.

72974817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93237 (or 93231 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 72974817 is about 8542.5298945921. The cubic root of 72974817 is about 417.8858555268.

The spelling of 72974817 in words is "seventy-two million, nine hundred seventy-four thousand, eight hundred seventeen".