240043861 has 2 divisors, whose sum is σ = 240043862. Its totient is φ = 240043860.

The previous prime is 240043831. The next prime is 240043871. The reversal of 240043861 is 168340042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227828836 + 12215025 = 15094^2 + 3495^2 .

It is a cyclic number.

It is not a de Polignac number, because 240043861 - 2⁷ = 240043733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240043831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120021930 + 120021931.

It is an arithmetic number, because the mean of its divisors is an integer number (120021931).

Almost surely, 2^240043861 is an apocalyptic number.

It is an amenable number.

240043861 is a deficient number, since it is larger than the sum of its proper divisors (1).

240043861 is an equidigital number, since it uses as much as digits as its factorization.

240043861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 240043861 is about 15493.3489278464. The cubic root of 240043861 is about 621.4843561973.

The spelling of 240043861 in words is "two hundred forty million, forty-three thousand, eight hundred sixty-one".