731366731 has 2 divisors, whose sum is σ = 731366732. Its totient is φ = 731366730.

The previous prime is 731366717. The next prime is 731366743. The reversal of 731366731 is 137663137.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 731366731 - 2⁹ = 731366219 is a prime.

It is a super-2 number, since 2×731366731² = 1069794590427252722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (731366771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365683365 + 365683366.

It is an arithmetic number, because the mean of its divisors is an integer number (365683366).

Almost surely, 2^731366731 is an apocalyptic number.

731366731 is a deficient number, since it is larger than the sum of its proper divisors (1).

731366731 is an equidigital number, since it uses as much as digits as its factorization.

731366731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 37.

The square root of 731366731 is about 27043.7928368045. The cubic root of 731366731 is about 900.9729112663.

The spelling of 731366731 in words is "seven hundred thirty-one million, three hundred sixty-six thousand, seven hundred thirty-one".