261875659 has 2 divisors, whose sum is σ = 261875660. Its totient is φ = 261875658.

The previous prime is 261875639. The next prime is 261875671. The reversal of 261875659 is 956578162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261875659 - 2⁹ = 261875147 is a prime.

It is not a weakly prime, because it can be changed into another prime (261875629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130937829 + 130937830.

It is an arithmetic number, because the mean of its divisors is an integer number (130937830).

Almost surely, 2^261875659 is an apocalyptic number.

261875659 is a deficient number, since it is larger than the sum of its proper divisors (1).

261875659 is an equidigital number, since it uses as much as digits as its factorization.

261875659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 49.

The square root of 261875659 is about 16182.5726941052. The cubic root of 261875659 is about 639.7815489798.

The spelling of 261875659 in words is "two hundred sixty-one million, eight hundred seventy-five thousand, six hundred fifty-nine".