72974747 has 2 divisors, whose sum is σ = 72974748. Its totient is φ = 72974746.

The previous prime is 72974731. The next prime is 72974753. The reversal of 72974747 is 74747927.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72974747 - 2⁴ = 72974731 is a prime.

It is not a weakly prime, because it can be changed into another prime (72974777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36487373 + 36487374.

It is an arithmetic number, because the mean of its divisors is an integer number (36487374).

Almost surely, 2^72974747 is an apocalyptic number.

72974747 is a deficient number, since it is larger than the sum of its proper divisors (1).

72974747 is an equidigital number, since it uses as much as digits as its factorization.

72974747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691488, while the sum is 47.

The square root of 72974747 is about 8542.5257974442. The cubic root of 72974747 is about 417.8857219098.

The spelling of 72974747 in words is "seventy-two million, nine hundred seventy-four thousand, seven hundred forty-seven".