1231169263 has 2 divisors, whose sum is σ = 1231169264. Its totient is φ = 1231169262.

The previous prime is 1231169221. The next prime is 1231169267. The reversal of 1231169263 is 3629611321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231169263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231169267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615584631 + 615584632.

It is an arithmetic number, because the mean of its divisors is an integer number (615584632).

Almost surely, 2^1231169263 is an apocalyptic number.

1231169263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231169263 is an equidigital number, since it uses as much as digits as its factorization.

1231169263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 1231169263 is about 35088.0216455702. The cubic root of 1231169263 is about 1071.7806734482.

The spelling of 1231169263 in words is "one billion, two hundred thirty-one million, one hundred sixty-nine thousand, two hundred sixty-three".