72869491 has 2 divisors, whose sum is σ = 72869492. Its totient is φ = 72869490.

The previous prime is 72869479. The next prime is 72869507. The reversal of 72869491 is 19496827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72869491 - 2¹⁵ = 72836723 is a prime.

It is not a weakly prime, because it can be changed into another prime (72869471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36434745 + 36434746.

It is an arithmetic number, because the mean of its divisors is an integer number (36434746).

Almost surely, 2^72869491 is an apocalyptic number.

72869491 is a deficient number, since it is larger than the sum of its proper divisors (1).

72869491 is an equidigital number, since it uses as much as digits as its factorization.

72869491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 72869491 is about 8536.3628671701. The cubic root of 72869491 is about 417.6847110773.

The spelling of 72869491 in words is "seventy-two million, eight hundred sixty-nine thousand, four hundred ninety-one".