240969857 has 2 divisors, whose sum is σ = 240969858. Its totient is φ = 240969856.

The previous prime is 240969823. The next prime is 240969881. The reversal of 240969857 is 758969042.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238671601 + 2298256 = 15449^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 240969857 - 2¹⁴ = 240953473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240969887) 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, 120484928 + 120484929.

It is an arithmetic number, because the mean of its divisors is an integer number (120484929).

Almost surely, 2^240969857 is an apocalyptic number.

It is an amenable number.

240969857 is a deficient number, since it is larger than the sum of its proper divisors (1).

240969857 is an equidigital number, since it uses as much as digits as its factorization.

240969857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 240969857 is about 15523.2038252417. The cubic root of 240969857 is about 622.2824792280.

The spelling of 240969857 in words is "two hundred forty million, nine hundred sixty-nine thousand, eight hundred fifty-seven".