12607991 has 8 divisors (see below), whose sum is σ = 13780368. Its totient is φ = 11440000.

The previous prime is 12607939. The next prime is 12608017. The reversal of 12607991 is 19970621.

12607991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12607991 - 2⁶ = 12607927 is a prime.

It is a super-2 number, since 2×12607991² = 317922874112162, 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 (12607391) 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, 9041 + ... + 10341.

It is an arithmetic number, because the mean of its divisors is an integer number (1722546).

Almost surely, 2^12607991 is an apocalyptic number.

12607991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12607991 is a deficient number, since it is larger than the sum of its proper divisors (1172377).

12607991 is a wasteful number, since it uses less digits than its factorization.

12607991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 12607991 is about 3550.7732960582. The cubic root of 12607991 is about 232.7458593193.

The spelling of 12607991 in words is "twelve million, six hundred seven thousand, nine hundred ninety-one".