12998691 has 8 divisors (see below), whose sum is σ = 19257360. Its totient is φ = 8665776.

The previous prime is 12998683. The next prime is 12998707. The reversal of 12998691 is 19689921.

It is not a de Polignac number, because 12998691 - 2³ = 12998683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12993691) 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, 240690 + ... + 240743.

It is an arithmetic number, because the mean of its divisors is an integer number (2407170).

Almost surely, 2^12998691 is an apocalyptic number.

12998691 is a deficient number, since it is larger than the sum of its proper divisors (6258669).

12998691 is an equidigital number, since it uses as much as digits as its factorization.

12998691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481442 (or 481436 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 12998691 is about 3605.3697452550. The cubic root of 12998691 is about 235.1255764633.

It can be divided in two parts, 12998 and 691, that added together give a square (13689 = 117²).

The spelling of 12998691 in words is "twelve million, nine hundred ninety-eight thousand, six hundred ninety-one".