72578263 has 2 divisors, whose sum is σ = 72578264. Its totient is φ = 72578262.

The previous prime is 72578243. The next prime is 72578273. The reversal of 72578263 is 36287527.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72578263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72578243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36289131 + 36289132.

It is an arithmetic number, because the mean of its divisors is an integer number (36289132).

Almost surely, 2^72578263 is an apocalyptic number.

72578263 is a deficient number, since it is larger than the sum of its proper divisors (1).

72578263 is an equidigital number, since it uses as much as digits as its factorization.

72578263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 72578263 is about 8519.2877049669. The cubic root of 72578263 is about 417.1275327956.

The spelling of 72578263 in words is "seventy-two million, five hundred seventy-eight thousand, two hundred sixty-three".