240645677 has 2 divisors, whose sum is σ = 240645678. Its totient is φ = 240645676.

The previous prime is 240645667. The next prime is 240645679. The reversal of 240645677 is 776546042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143544361 + 97101316 = 11981^2 + 9854^2 .

It is a cyclic number.

It is not a de Polignac number, because 240645677 - 2⁴ = 240645661 is a prime.

Together with 240645679, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240645679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120322838 + 120322839.

It is an arithmetic number, because the mean of its divisors is an integer number (120322839).

Almost surely, 2^240645677 is an apocalyptic number.

It is an amenable number.

240645677 is a deficient number, since it is larger than the sum of its proper divisors (1).

240645677 is an equidigital number, since it uses as much as digits as its factorization.

240645677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 41.

The square root of 240645677 is about 15512.7585232285. The cubic root of 240645677 is about 622.0032989903.

The spelling of 240645677 in words is "two hundred forty million, six hundred forty-five thousand, six hundred seventy-seven".