73697731 has 2 divisors, whose sum is σ = 73697732. Its totient is φ = 73697730.

The previous prime is 73697707. The next prime is 73697753. The reversal of 73697731 is 13779637.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73697731 - 2¹¹ = 73695683 is a prime.

It is a super-2 number, since 2×73697731² = 10862711109096722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73697761) 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, 36848865 + 36848866.

It is an arithmetic number, because the mean of its divisors is an integer number (36848866).

Almost surely, 2^73697731 is an apocalyptic number.

73697731 is a deficient number, since it is larger than the sum of its proper divisors (1).

73697731 is an equidigital number, since it uses as much as digits as its factorization.

73697731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 166698, while the sum is 43.

The square root of 73697731 is about 8584.7382604247. The cubic root of 73697731 is about 419.2612315227.

The spelling of 73697731 in words is "seventy-three million, six hundred ninety-seven thousand, seven hundred thirty-one".