262640291 has 2 divisors, whose sum is σ = 262640292. Its totient is φ = 262640290.

The previous prime is 262640267. The next prime is 262640297. The reversal of 262640291 is 192046262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 262640291 - 2⁶ = 262640227 is a prime.

It is not a weakly prime, because it can be changed into another prime (262640297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131320145 + 131320146.

It is an arithmetic number, because the mean of its divisors is an integer number (131320146).

Almost surely, 2^262640291 is an apocalyptic number.

262640291 is a deficient number, since it is larger than the sum of its proper divisors (1).

262640291 is an equidigital number, since it uses as much as digits as its factorization.

262640291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 262640291 is about 16206.1806419650. The cubic root of 262640291 is about 640.4036280406.

The spelling of 262640291 in words is "two hundred sixty-two million, six hundred forty thousand, two hundred ninety-one".