1144665631 has 2 divisors, whose sum is σ = 1144665632. Its totient is φ = 1144665630.

The previous prime is 1144665629. The next prime is 1144665637. The reversal of 1144665631 is 1365664411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1144665631 - 2¹ = 1144665629 is a prime.

It is a super-2 number, since 2×1144665631² = 2620518813585256322, which contains 22 as substring.

Together with 1144665629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144665637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572332815 + 572332816.

It is an arithmetic number, because the mean of its divisors is an integer number (572332816).

Almost surely, 2^1144665631 is an apocalyptic number.

1144665631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144665631 is an equidigital number, since it uses as much as digits as its factorization.

1144665631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 1144665631 is about 33832.9075162038. The cubic root of 1144665631 is about 1046.0671107593.

It can be divided in two parts, 11446 and 65631, that added together give a palindrome (77077).

The spelling of 1144665631 in words is "one billion, one hundred forty-four million, six hundred sixty-five thousand, six hundred thirty-one".