73998731 has 2 divisors, whose sum is σ = 73998732. Its totient is φ = 73998730.

The previous prime is 73998689. The next prime is 73998737. The reversal of 73998731 is 13789937.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73998731 - 2⁶ = 73998667 is a prime.

It is a super-2 number, since 2×73998731² = 10951624379220722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73998737) 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, 36999365 + 36999366.

It is an arithmetic number, because the mean of its divisors is an integer number (36999366).

Almost surely, 2^73998731 is an apocalyptic number.

73998731 is a deficient number, since it is larger than the sum of its proper divisors (1).

73998731 is an equidigital number, since it uses as much as digits as its factorization.

73998731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 47.

The square root of 73998731 is about 8602.2515075996. The cubic root of 73998731 is about 419.8312455072.

The spelling of 73998731 in words is "seventy-three million, nine hundred ninety-eight thousand, seven hundred thirty-one".