72986863 has 2 divisors, whose sum is σ = 72986864. Its totient is φ = 72986862.

The previous prime is 72986861. The next prime is 72986873. The reversal of 72986863 is 36868927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72986863 - 2¹ = 72986861 is a prime.

Together with 72986861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72986861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36493431 + 36493432.

It is an arithmetic number, because the mean of its divisors is an integer number (36493432).

Almost surely, 2^72986863 is an apocalyptic number.

72986863 is a deficient number, since it is larger than the sum of its proper divisors (1).

72986863 is an equidigital number, since it uses as much as digits as its factorization.

72986863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 72986863 is about 8543.2349259516. The cubic root of 72986863 is about 417.9088478240.

It can be divided in two parts, 7298 and 6863, that added together give a square (14161 = 119²).

The spelling of 72986863 in words is "seventy-two million, nine hundred eighty-six thousand, eight hundred sixty-three".