12739967 has 8 divisors (see below), whose sum is σ = 12954240. Its totient is φ = 12527640.

The previous prime is 12739943. The next prime is 12739973. The reversal of 12739967 is 76993721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12739967 - 2⁸ = 12739711 is a prime.

It is a super-2 number, since 2×12739967² = 324613518322178, 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 (12739927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18092 + ... + 18782.

It is an arithmetic number, because the mean of its divisors is an integer number (1619280).

Almost surely, 2^12739967 is an apocalyptic number.

12739967 is a deficient number, since it is larger than the sum of its proper divisors (214273).

12739967 is a wasteful number, since it uses less digits than its factorization.

12739967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973.

The product of its digits is 142884, while the sum is 44.

The square root of 12739967 is about 3569.3090367745. The cubic root of 12739967 is about 233.5551425936. Note that the first 3 decimals are identical.

The spelling of 12739967 in words is "twelve million, seven hundred thirty-nine thousand, nine hundred sixty-seven".