265440943 has 2 divisors, whose sum is σ = 265440944. Its totient is φ = 265440942.

The previous prime is 265440893. The next prime is 265440961. The reversal of 265440943 is 349044562.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265440943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265444943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132720471 + 132720472.

It is an arithmetic number, because the mean of its divisors is an integer number (132720472).

Almost surely, 2^265440943 is an apocalyptic number.

265440943 is a deficient number, since it is larger than the sum of its proper divisors (1).

265440943 is an equidigital number, since it uses as much as digits as its factorization.

265440943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 265440943 is about 16292.3584235064. The cubic root of 265440943 is about 642.6718888869.

The spelling of 265440943 in words is "two hundred sixty-five million, four hundred forty thousand, nine hundred forty-three".