742656731 has 2 divisors, whose sum is σ = 742656732. Its totient is φ = 742656730.

The previous prime is 742656721. The next prime is 742656763. The reversal of 742656731 is 137656247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 742656731 - 2¹⁰ = 742655707 is a prime.

It is a super-2 number, since 2×742656731² = 1103078040199212722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (742656721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371328365 + 371328366.

It is an arithmetic number, because the mean of its divisors is an integer number (371328366).

Almost surely, 2^742656731 is an apocalyptic number.

742656731 is a deficient number, since it is larger than the sum of its proper divisors (1).

742656731 is an equidigital number, since it uses as much as digits as its factorization.

742656731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 41.

The square root of 742656731 is about 27251.7289543251. The cubic root of 742656731 is about 905.5853202044.

The spelling of 742656731 in words is "seven hundred forty-two million, six hundred fifty-six thousand, seven hundred thirty-one".