264246991 has 2 divisors, whose sum is σ = 264246992. Its totient is φ = 264246990.

The previous prime is 264246989. The next prime is 264247033. The reversal of 264246991 is 199642462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264246991 - 2¹ = 264246989 is a prime.

Together with 264246989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264246971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132123495 + 132123496.

It is an arithmetic number, because the mean of its divisors is an integer number (132123496).

Almost surely, 2^264246991 is an apocalyptic number.

264246991 is a deficient number, since it is larger than the sum of its proper divisors (1).

264246991 is an equidigital number, since it uses as much as digits as its factorization.

264246991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 264246991 is about 16255.6756549828. The cubic root of 264246991 is about 641.7068622559.

The spelling of 264246991 in words is "two hundred sixty-four million, two hundred forty-six thousand, nine hundred ninety-one".