261335359 has 2 divisors, whose sum is σ = 261335360. Its totient is φ = 261335358.

The previous prime is 261335341. The next prime is 261335413. The reversal of 261335359 is 953533162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261335359 - 2¹⁷ = 261204287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261330359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130667679 + 130667680.

It is an arithmetic number, because the mean of its divisors is an integer number (130667680).

Almost surely, 2^261335359 is an apocalyptic number.

261335359 is a deficient number, since it is larger than the sum of its proper divisors (1).

261335359 is an equidigital number, since it uses as much as digits as its factorization.

261335359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 37.

The square root of 261335359 is about 16165.8701900021. The cubic root of 261335359 is about 639.3412484497.

The spelling of 261335359 in words is "two hundred sixty-one million, three hundred thirty-five thousand, three hundred fifty-nine".