261596967 has 4 divisors (see below), whose sum is σ = 348795960. Its totient is φ = 174397976.

The previous prime is 261596939. The next prime is 261596999. The reversal of 261596967 is 769695162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261596967 - 2⁶ = 261596903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261592967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43599492 + ... + 43599497.

It is an arithmetic number, because the mean of its divisors is an integer number (87198990).

Almost surely, 2^261596967 is an apocalyptic number.

261596967 is a deficient number, since it is larger than the sum of its proper divisors (87198993).

261596967 is an equidigital number, since it uses as much as digits as its factorization.

261596967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87198992.

The product of its digits is 1224720, while the sum is 51.

The square root of 261596967 is about 16173.9595337691. The cubic root of 261596967 is about 639.5545133858.

The spelling of 261596967 in words is "two hundred sixty-one million, five hundred ninety-six thousand, nine hundred sixty-seven".