1243296631 has 4 divisors (see below), whose sum is σ = 1266755112. Its totient is φ = 1219838152.

The previous prime is 1243296629. The next prime is 1243296641. The reversal of 1243296631 is 1366923421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1366923421 = 10589 ⋅129089.

It is a cyclic number.

It is not a de Polignac number, because 1243296631 - 2¹ = 1243296629 is a prime.

It is a super-2 number, since 2×1243296631² = 3091573025311900322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243296601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11729161 + ... + 11729266.

It is an arithmetic number, because the mean of its divisors is an integer number (316688778).

Almost surely, 2^1243296631 is an apocalyptic number.

1243296631 is a deficient number, since it is larger than the sum of its proper divisors (23458481).

1243296631 is an equidigital number, since it uses as much as digits as its factorization.

1243296631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23458480.

The product of its digits is 46656, while the sum is 37.

The square root of 1243296631 is about 35260.4116680449. The cubic root of 1243296631 is about 1075.2882965006.

The spelling of 1243296631 in words is "one billion, two hundred forty-three million, two hundred ninety-six thousand, six hundred thirty-one".