72942979 has 2 divisors, whose sum is σ = 72942980. Its totient is φ = 72942978.

The previous prime is 72942953. The next prime is 72942983. The reversal of 72942979 is 97924927.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72942979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72942949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36471489 + 36471490.

It is an arithmetic number, because the mean of its divisors is an integer number (36471490).

Almost surely, 2^72942979 is an apocalyptic number.

72942979 is a deficient number, since it is larger than the sum of its proper divisors (1).

72942979 is an equidigital number, since it uses as much as digits as its factorization.

72942979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 72942979 is about 8540.6661918143. Note that the first 3 decimals coincide. The cubic root of 72942979 is about 417.8250738956.

The spelling of 72942979 in words is "seventy-two million, nine hundred forty-two thousand, nine hundred seventy-nine".