12977409 has 16 divisors (see below), whose sum is σ = 18558720. Its totient is φ = 8037120.

The previous prime is 12977407. The next prime is 12977411. The reversal of 12977409 is 90477921.

It is an interprime number because it is at equal distance from previous prime (12977407) and next prime (12977411).

It is not a de Polignac number, because 12977409 - 2¹ = 12977407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12977407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2419 + ... + 5639.

It is an arithmetic number, because the mean of its divisors is an integer number (1159920).

Almost surely, 2^12977409 is an apocalyptic number.

It is an amenable number.

12977409 is a deficient number, since it is larger than the sum of its proper divisors (5581311).

12977409 is a wasteful number, since it uses less digits than its factorization.

12977409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 12977409 is about 3602.4171052225. The cubic root of 12977409 is about 234.9971872306.

The spelling of 12977409 in words is "twelve million, nine hundred seventy-seven thousand, four hundred nine".