1263632431 has 2 divisors, whose sum is σ = 1263632432. Its totient is φ = 1263632430.

The previous prime is 1263632429. The next prime is 1263632453. The reversal of 1263632431 is 1342363621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263632431 - 2¹ = 1263632429 is a prime.

It is a super-2 number, since 2×1263632431² = 3193533841349939522, which contains 22 as substring.

Together with 1263632429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1263632393 and 1263632402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263632401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631816215 + 631816216.

It is an arithmetic number, because the mean of its divisors is an integer number (631816216).

Almost surely, 2^1263632431 is an apocalyptic number.

1263632431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263632431 is an equidigital number, since it uses as much as digits as its factorization.

1263632431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

The square root of 1263632431 is about 35547.6079504655. The cubic root of 1263632431 is about 1081.1192189668.

The spelling of 1263632431 in words is "one billion, two hundred sixty-three million, six hundred thirty-two thousand, four hundred thirty-one".