261113497 has 2 divisors, whose sum is σ = 261113498. Its totient is φ = 261113496.

The previous prime is 261113483. The next prime is 261113513. The reversal of 261113497 is 794311162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252047376 + 9066121 = 15876^2 + 3011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261113497 is a prime.

It is not a weakly prime, because it can be changed into another prime (261113467) 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, 130556748 + 130556749.

It is an arithmetic number, because the mean of its divisors is an integer number (130556749).

Almost surely, 2^261113497 is an apocalyptic number.

It is an amenable number.

261113497 is a deficient number, since it is larger than the sum of its proper divisors (1).

261113497 is an equidigital number, since it uses as much as digits as its factorization.

261113497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 261113497 is about 16159.0066835805. The cubic root of 261113497 is about 639.1602732107.

The spelling of 261113497 in words is "two hundred sixty-one million, one hundred thirteen thousand, four hundred ninety-seven".