72837931 has 2 divisors, whose sum is σ = 72837932. Its totient is φ = 72837930.

The previous prime is 72837907. The next prime is 72837943. The reversal of 72837931 is 13973827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72837931 - 2¹⁹ = 72313643 is a prime.

It is a super-2 number, since 2×72837931² = 10610728384721522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72837901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36418965 + 36418966.

It is an arithmetic number, because the mean of its divisors is an integer number (36418966).

Almost surely, 2^72837931 is an apocalyptic number.

72837931 is a deficient number, since it is larger than the sum of its proper divisors (1).

72837931 is an equidigital number, since it uses as much as digits as its factorization.

72837931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 72837931 is about 8534.5141045053. The cubic root of 72837931 is about 417.6244021935.

The spelling of 72837931 in words is "seventy-two million, eight hundred thirty-seven thousand, nine hundred thirty-one".