240356491 has 2 divisors, whose sum is σ = 240356492. Its totient is φ = 240356490.

The previous prime is 240356483. The next prime is 240356497. The reversal of 240356491 is 194653042.

It is a happy number.

240356491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240356491 - 2³ = 240356483 is a prime.

It is not a weakly prime, because it can be changed into another prime (240356497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120178245 + 120178246.

It is an arithmetic number, because the mean of its divisors is an integer number (120178246).

Almost surely, 2^240356491 is an apocalyptic number.

240356491 is a deficient number, since it is larger than the sum of its proper divisors (1).

240356491 is an equidigital number, since it uses as much as digits as its factorization.

240356491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 240356491 is about 15503.4348129697. The cubic root of 240356491 is about 621.7540435307.

The spelling of 240356491 in words is "two hundred forty million, three hundred fifty-six thousand, four hundred ninety-one".