73988731 has 2 divisors, whose sum is σ = 73988732. Its totient is φ = 73988730.

The previous prime is 73988729. The next prime is 73988741. The reversal of 73988731 is 13788937.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73988731 - 2¹ = 73988729 is a prime.

It is a super-2 number, since 2×73988731² = 10948664629980722, which contains 22 as substring.

Together with 73988729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (73988701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36994365 + 36994366.

It is an arithmetic number, because the mean of its divisors is an integer number (36994366).

Almost surely, 2^73988731 is an apocalyptic number.

73988731 is a deficient number, since it is larger than the sum of its proper divisors (1).

73988731 is an equidigital number, since it uses as much as digits as its factorization.

73988731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 73988731 is about 8601.6702447839. The cubic root of 73988731 is about 419.8123330136.

It can be divided in two parts, 7398 and 8731, that added together give a square (16129 = 127²).

The spelling of 73988731 in words is "seventy-three million, nine hundred eighty-eight thousand, seven hundred thirty-one".