240766861 has 2 divisors, whose sum is σ = 240766862. Its totient is φ = 240766860.

The previous prime is 240766843. The next prime is 240766871. The reversal of 240766861 is 168667042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230462761 + 10304100 = 15181^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 240766861 - 2¹¹ = 240764813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240766831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120383430 + 120383431.

It is an arithmetic number, because the mean of its divisors is an integer number (120383431).

Almost surely, 2^240766861 is an apocalyptic number.

It is an amenable number.

240766861 is a deficient number, since it is larger than the sum of its proper divisors (1).

240766861 is an equidigital number, since it uses as much as digits as its factorization.

240766861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 240766861 is about 15516.6639778014. The cubic root of 240766861 is about 622.1076906413.

The spelling of 240766861 in words is "two hundred forty million, seven hundred sixty-six thousand, eight hundred sixty-one".