12963731 has 4 divisors (see below), whose sum is σ = 14142264. Its totient is φ = 11785200.

The previous prime is 12963703. The next prime is 12963733. The reversal of 12963731 is 13736921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12963731 is a prime.

It is a super-2 number, since 2×12963731² = 336116642880722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12963733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589250 + ... + 589271.

It is an arithmetic number, because the mean of its divisors is an integer number (3535566).

Almost surely, 2^12963731 is an apocalyptic number.

12963731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12963731 is a deficient number, since it is larger than the sum of its proper divisors (1178533).

12963731 is a wasteful number, since it uses less digits than its factorization.

12963731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178532.

The product of its digits is 6804, while the sum is 32.

The square root of 12963731 is about 3600.5181571546. The cubic root of 12963731 is about 234.9145970037.

The spelling of 12963731 in words is "twelve million, nine hundred sixty-three thousand, seven hundred thirty-one".