240645947 has 2 divisors, whose sum is σ = 240645948. Its totient is φ = 240645946.

The previous prime is 240645919. The next prime is 240645983. The reversal of 240645947 is 749546042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240645947 - 2¹⁶ = 240580411 is a prime.

It is not a weakly prime, because it can be changed into another prime (240645347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120322973 + 120322974.

It is an arithmetic number, because the mean of its divisors is an integer number (120322974).

Almost surely, 2^240645947 is an apocalyptic number.

240645947 is a deficient number, since it is larger than the sum of its proper divisors (1).

240645947 is an equidigital number, since it uses as much as digits as its factorization.

240645947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 240645947 is about 15512.7672257402. The cubic root of 240645947 is about 622.0035316156.

The spelling of 240645947 in words is "two hundred forty million, six hundred forty-five thousand, nine hundred forty-seven".