72846391 has 2 divisors, whose sum is σ = 72846392. Its totient is φ = 72846390.

The previous prime is 72846379. The next prime is 72846401. The reversal of 72846391 is 19364827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72846391 - 2¹⁵ = 72813623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72846331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36423195 + 36423196.

It is an arithmetic number, because the mean of its divisors is an integer number (36423196).

Almost surely, 2^72846391 is an apocalyptic number.

72846391 is a deficient number, since it is larger than the sum of its proper divisors (1).

72846391 is an equidigital number, since it uses as much as digits as its factorization.

72846391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 72846391 is about 8535.0097246576. The cubic root of 72846391 is about 417.6405703521.

It can be divided in two parts, 72846 and 391, that added together give a palindrome (73237).

The spelling of 72846391 in words is "seventy-two million, eight hundred forty-six thousand, three hundred ninety-one".