265491749 has 2 divisors, whose sum is σ = 265491750. Its totient is φ = 265491748.

The previous prime is 265491727. The next prime is 265491773. The reversal of 265491749 is 947194562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146289025 + 119202724 = 12095^2 + 10918^2 .

It is a cyclic number.

It is not a de Polignac number, because 265491749 - 2⁸ = 265491493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265491349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132745874 + 132745875.

It is an arithmetic number, because the mean of its divisors is an integer number (132745875).

Almost surely, 2^265491749 is an apocalyptic number.

It is an amenable number.

265491749 is a deficient number, since it is larger than the sum of its proper divisors (1).

265491749 is an equidigital number, since it uses as much as digits as its factorization.

265491749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 265491749 is about 16293.9175461275. The cubic root of 265491749 is about 642.7128892247.

The spelling of 265491749 in words is "two hundred sixty-five million, four hundred ninety-one thousand, seven hundred forty-nine".