73928731 has 2 divisors, whose sum is σ = 73928732. Its totient is φ = 73928730.

The previous prime is 73928713. The next prime is 73928741. The reversal of 73928731 is 13782937.

Together with previous prime (73928713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73928731 - 2¹¹ = 73926683 is a prime.

It is a super-2 number, since 2×73928731² = 10930914534540722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73928741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36964365 + 36964366.

It is an arithmetic number, because the mean of its divisors is an integer number (36964366).

Almost surely, 2^73928731 is an apocalyptic number.

73928731 is a deficient number, since it is larger than the sum of its proper divisors (1).

73928731 is an equidigital number, since it uses as much as digits as its factorization.

73928731 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 73928731 is about 8598.1818426921. The cubic root of 73928731 is about 419.6988222509.

The spelling of 73928731 in words is "seventy-three million, nine hundred twenty-eight thousand, seven hundred thirty-one".