72397867 has 2 divisors, whose sum is σ = 72397868. Its totient is φ = 72397866.

The previous prime is 72397861. The next prime is 72397873. The reversal of 72397867 is 76879327.

It is a balanced prime because it is at equal distance from previous prime (72397861) and next prime (72397873).

It is a cyclic number.

It is not a de Polignac number, because 72397867 - 2⁷ = 72397739 is a prime.

It is a super-2 number, since 2×72397867² = 10482902292299378, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72397867.

It is not a weakly prime, because it can be changed into another prime (72397861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36198933 + 36198934.

It is an arithmetic number, because the mean of its divisors is an integer number (36198934).

Almost surely, 2^72397867 is an apocalyptic number.

72397867 is a deficient number, since it is larger than the sum of its proper divisors (1).

72397867 is an equidigital number, since it uses as much as digits as its factorization.

72397867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 49.

The square root of 72397867 is about 8508.6936130055. The cubic root of 72397867 is about 416.7816506837.

The spelling of 72397867 in words is "seventy-two million, three hundred ninety-seven thousand, eight hundred sixty-seven".