72866023 has 2 divisors, whose sum is σ = 72866024. Its totient is φ = 72866022.

The previous prime is 72865993. The next prime is 72866041. The reversal of 72866023 is 32066827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72866023 - 2⁹ = 72865511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72866023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72866623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36433011 + 36433012.

It is an arithmetic number, because the mean of its divisors is an integer number (36433012).

Almost surely, 2^72866023 is an apocalyptic number.

72866023 is a deficient number, since it is larger than the sum of its proper divisors (1).

72866023 is an equidigital number, since it uses as much as digits as its factorization.

72866023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 72866023 is about 8536.1597337444. The cubic root of 72866023 is about 417.6780848312.

The spelling of 72866023 in words is "seventy-two million, eight hundred sixty-six thousand, twenty-three".