265380749 has 2 divisors, whose sum is σ = 265380750. Its totient is φ = 265380748.

The previous prime is 265380737. The next prime is 265380751. The reversal of 265380749 is 947083562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184470724 + 80910025 = 13582^2 + 8995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265380749 is a prime.

It is a Sophie Germain prime.

Together with 265380751, it forms a pair of twin primes.

It is a Chen 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 (265380719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132690374 + 132690375.

It is an arithmetic number, because the mean of its divisors is an integer number (132690375).

Almost surely, 2^265380749 is an apocalyptic number.

It is an amenable number.

265380749 is a deficient number, since it is larger than the sum of its proper divisors (1).

265380749 is an equidigital number, since it uses as much as digits as its factorization.

265380749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 265380749 is about 16290.5110110150. The cubic root of 265380749 is about 642.6233056806.

The spelling of 265380749 in words is "two hundred sixty-five million, three hundred eighty thousand, seven hundred forty-nine".