72930857 has 2 divisors, whose sum is σ = 72930858. Its totient is φ = 72930856.

The previous prime is 72930829. The next prime is 72930877. The reversal of 72930857 is 75803927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41783296 + 31147561 = 6464^2 + 5581^2 .

It is a cyclic number.

It is not a de Polignac number, because 72930857 - 2¹² = 72926761 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72930827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36465428 + 36465429.

It is an arithmetic number, because the mean of its divisors is an integer number (36465429).

Almost surely, 2^72930857 is an apocalyptic number.

It is an amenable number.

72930857 is a deficient number, since it is larger than the sum of its proper divisors (1).

72930857 is an equidigital number, since it uses as much as digits as its factorization.

72930857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 72930857 is about 8539.9564987182. The cubic root of 72930857 is about 417.8019272487.

The spelling of 72930857 in words is "seventy-two million, nine hundred thirty thousand, eight hundred fifty-seven".