72974339 has 2 divisors, whose sum is σ = 72974340. Its totient is φ = 72974338.

The previous prime is 72974329. The next prime is 72974357. The reversal of 72974339 is 93347927.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72974339 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72974339.

It is not a weakly prime, because it can be changed into another prime (72974309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36487169 + 36487170.

It is an arithmetic number, because the mean of its divisors is an integer number (36487170).

Almost surely, 2^72974339 is an apocalyptic number.

72974339 is a deficient number, since it is larger than the sum of its proper divisors (1).

72974339 is an equidigital number, since it uses as much as digits as its factorization.

72974339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 44.

The square root of 72974339 is about 8542.5019168859. The cubic root of 72974339 is about 417.8849431121.

The spelling of 72974339 in words is "seventy-two million, nine hundred seventy-four thousand, three hundred thirty-nine".