261411659 has 2 divisors, whose sum is σ = 261411660. Its totient is φ = 261411658.

The previous prime is 261411637. The next prime is 261411673. The reversal of 261411659 is 956114162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261411659 - 2¹² = 261407563 is a prime.

It is a super-2 number, since 2×261411659² = 136672110922264562, which contains 22 as substring.

It is a Chen prime.

It is equal to p_14268815 and since 261411659 and 14268815 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (261411259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130705829 + 130705830.

It is an arithmetic number, because the mean of its divisors is an integer number (130705830).

Almost surely, 2^261411659 is an apocalyptic number.

261411659 is a deficient number, since it is larger than the sum of its proper divisors (1).

261411659 is an equidigital number, since it uses as much as digits as its factorization.

261411659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 261411659 is about 16168.2299278554. The cubic root of 261411659 is about 639.4034635166.

The spelling of 261411659 in words is "two hundred sixty-one million, four hundred eleven thousand, six hundred fifty-nine".