263144657 has 2 divisors, whose sum is σ = 263144658. Its totient is φ = 263144656.

The previous prime is 263144603. The next prime is 263144659. The reversal of 263144657 is 756441362.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234671761 + 28472896 = 15319^2 + 5336^2 .

It is a cyclic number.

It is not a de Polignac number, because 263144657 - 2⁶ = 263144593 is a prime.

It is a super-2 number, since 2×263144657² = 138490221015295298, which contains 22 as substring.

Together with 263144659, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263144657.

It is not a weakly prime, because it can be changed into another prime (263144659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131572328 + 131572329.

It is an arithmetic number, because the mean of its divisors is an integer number (131572329).

Almost surely, 2^263144657 is an apocalyptic number.

It is an amenable number.

263144657 is a deficient number, since it is larger than the sum of its proper divisors (1).

263144657 is an equidigital number, since it uses as much as digits as its factorization.

263144657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 38.

The square root of 263144657 is about 16221.7340934932. The cubic root of 263144657 is about 640.8133027800.

The spelling of 263144657 in words is "two hundred sixty-three million, one hundred forty-four thousand, six hundred fifty-seven".