72578371 has 2 divisors, whose sum is σ = 72578372. Its totient is φ = 72578370.

The previous prime is 72578357. The next prime is 72578377. The reversal of 72578371 is 17387527.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72578371 - 2⁷ = 72578243 is a prime.

It is not a weakly prime, because it can be changed into another prime (72578377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36289185 + 36289186.

It is an arithmetic number, because the mean of its divisors is an integer number (36289186).

Almost surely, 2^72578371 is an apocalyptic number.

72578371 is a deficient number, since it is larger than the sum of its proper divisors (1).

72578371 is an equidigital number, since it uses as much as digits as its factorization.

72578371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82320, while the sum is 40.

The square root of 72578371 is about 8519.2940435226. The cubic root of 72578371 is about 417.1277396976.

The spelling of 72578371 in words is "seventy-two million, five hundred seventy-eight thousand, three hundred seventy-one".