72974617 has 4 divisors (see below), whose sum is σ = 73036980. Its totient is φ = 72912256.

The previous prime is 72974599. The next prime is 72974639. The reversal of 72974617 is 71647927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31036041 + 41938576 = 5571^2 + 6476^2 .

It is a cyclic number.

It is not a de Polignac number, because 72974617 - 2¹¹ = 72972569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72974677) 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, 29392 + ... + 31777.

It is an arithmetic number, because the mean of its divisors is an integer number (18259245).

Almost surely, 2^72974617 is an apocalyptic number.

It is an amenable number.

72974617 is a deficient number, since it is larger than the sum of its proper divisors (62363).

72974617 is a wasteful number, since it uses less digits than its factorization.

72974617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62362.

The product of its digits is 148176, while the sum is 43.

The square root of 72974617 is about 8542.5181884501. The cubic root of 72974617 is about 417.8854737638.

The spelling of 72974617 in words is "seventy-two million, nine hundred seventy-four thousand, six hundred seventeen".