73731331 has 2 divisors, whose sum is σ = 73731332. Its totient is φ = 73731330.

The previous prime is 73731323. The next prime is 73731377. The reversal of 73731331 is 13313737.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73731331 - 2³ = 73731323 is a prime.

It is a super-2 number, since 2×73731331² = 10872618342063122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73731331.

It is not a weakly prime, because it can be changed into another prime (73731131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36865665 + 36865666.

It is an arithmetic number, because the mean of its divisors is an integer number (36865666).

Almost surely, 2^73731331 is an apocalyptic number.

73731331 is a deficient number, since it is larger than the sum of its proper divisors (1).

73731331 is an equidigital number, since it uses as much as digits as its factorization.

73731331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3969, while the sum is 28.

The square root of 73731331 is about 8586.6949986593. The cubic root of 73731331 is about 419.3249378579.

The spelling of 73731331 in words is "seventy-three million, seven hundred thirty-one thousand, three hundred thirty-one".