240479917 has 2 divisors, whose sum is σ = 240479918. Its totient is φ = 240479916.

The previous prime is 240479879. The next prime is 240479923. The reversal of 240479917 is 719974042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240281001 + 198916 = 15501^2 + 446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240479917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240479947) 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, 120239958 + 120239959.

It is an arithmetic number, because the mean of its divisors is an integer number (120239959).

Almost surely, 2^240479917 is an apocalyptic number.

It is an amenable number.

240479917 is a deficient number, since it is larger than the sum of its proper divisors (1).

240479917 is an equidigital number, since it uses as much as digits as its factorization.

240479917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 240479917 is about 15507.4149038452. The cubic root of 240479917 is about 621.8604514226.

The spelling of 240479917 in words is "two hundred forty million, four hundred seventy-nine thousand, nine hundred seventeen".