72786871 has 2 divisors, whose sum is σ = 72786872. Its totient is φ = 72786870.

The previous prime is 72786863. The next prime is 72786893. The reversal of 72786871 is 17868727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72786871 - 2³ = 72786863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72786811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36393435 + 36393436.

It is an arithmetic number, because the mean of its divisors is an integer number (36393436).

Almost surely, 2^72786871 is an apocalyptic number.

72786871 is a deficient number, since it is larger than the sum of its proper divisors (1).

72786871 is an equidigital number, since it uses as much as digits as its factorization.

72786871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 46.

The square root of 72786871 is about 8531.5221971229. The cubic root of 72786871 is about 417.5267933132.

The spelling of 72786871 in words is "seventy-two million, seven hundred eighty-six thousand, eight hundred seventy-one".