240678731 has 2 divisors, whose sum is σ = 240678732. Its totient is φ = 240678730.

The previous prime is 240678727. The next prime is 240678751. The reversal of 240678731 is 137876042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240678731 - 2² = 240678727 is a prime.

It is a super-2 number, since 2×240678731² = 115852503111540722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240678751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120339365 + 120339366.

It is an arithmetic number, because the mean of its divisors is an integer number (120339366).

Almost surely, 2^240678731 is an apocalyptic number.

240678731 is a deficient number, since it is larger than the sum of its proper divisors (1).

240678731 is an equidigital number, since it uses as much as digits as its factorization.

240678731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 240678731 is about 15513.8238677639. The cubic root of 240678731 is about 622.0317762049.

The spelling of 240678731 in words is "two hundred forty million, six hundred seventy-eight thousand, seven hundred thirty-one".