240280913 has 2 divisors, whose sum is σ = 240280914. Its totient is φ = 240280912.

The previous prime is 240280879. The next prime is 240280993. The reversal of 240280913 is 319082042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240157009 + 123904 = 15497^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 240280913 - 2⁸ = 240280657 is a prime.

It is a super-2 number, since 2×240280913² = 115469834304227138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240280993) 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, 120140456 + 120140457.

It is an arithmetic number, because the mean of its divisors is an integer number (120140457).

Almost surely, 2^240280913 is an apocalyptic number.

It is an amenable number.

240280913 is a deficient number, since it is larger than the sum of its proper divisors (1).

240280913 is an equidigital number, since it uses as much as digits as its factorization.

240280913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 240280913 is about 15500.9971614732. The cubic root of 240280913 is about 621.6888683222.

Subtracting 240280913 from its reverse (319082042), we obtain a square (78801129 = 8877²).

The spelling of 240280913 in words is "two hundred forty million, two hundred eighty thousand, nine hundred thirteen".