12891879 has 96 divisors (see below), whose sum is σ = 26417664. Its totient is φ = 6065280.

The previous prime is 12891871. The next prime is 12891881. The reversal of 12891879 is 97819821.

It is not a de Polignac number, because 12891879 - 2³ = 12891871 is a prime.

It is a super-3 number, since 3×12891879³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12891871) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 243217 + ... + 243269.

It is an arithmetic number, because the mean of its divisors is an integer number (275184).

Almost surely, 2^12891879 is an apocalyptic number.

12891879 is an abundant number, since it is smaller than the sum of its proper divisors (13525785).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12891879 is a wasteful number, since it uses less digits than its factorization.

12891879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 87 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 12891879 is about 3590.5262845438. The cubic root of 12891879 is about 234.4797848256.

The spelling of 12891879 in words is "twelve million, eight hundred ninety-one thousand, eight hundred seventy-nine".