12977139 has 8 divisors (see below), whose sum is σ = 19774720. Its totient is φ = 7415496.

The previous prime is 12977131. The next prime is 12977141. The reversal of 12977139 is 93177921.

12977139 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 12977139 - 2³ = 12977131 is a prime.

It is a super-2 number, since 2×12977139² = 336812273250642, which contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 12977097 and 12977106.

It is not an unprimeable number, because it can be changed into a prime (12977131) 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, 308959 + ... + 309000.

It is an arithmetic number, because the mean of its divisors is an integer number (2471840).

Almost surely, 2^12977139 is an apocalyptic number.

12977139 is a deficient number, since it is larger than the sum of its proper divisors (6797581).

12977139 is an equidigital number, since it uses as much as digits as its factorization.

12977139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617969.

The product of its digits is 23814, while the sum is 39.

The square root of 12977139 is about 3602.3796301889. The cubic root of 12977139 is about 234.9955574835.

The spelling of 12977139 in words is "twelve million, nine hundred seventy-seven thousand, one hundred thirty-nine".