12977619 has 4 divisors (see below), whose sum is σ = 17303496. Its totient is φ = 8651744.

The previous prime is 12977617. The next prime is 12977651. The reversal of 12977619 is 91677921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12977619 - 2¹ = 12977617 is a prime.

It is a super-2 number, since 2×12977619² = 336837189818322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12977617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2162934 + ... + 2162939.

It is an arithmetic number, because the mean of its divisors is an integer number (4325874).

Almost surely, 2^12977619 is an apocalyptic number.

12977619 is a deficient number, since it is larger than the sum of its proper divisors (4325877).

12977619 is an equidigital number, since it uses as much as digits as its factorization.

12977619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325876.

The product of its digits is 47628, while the sum is 42.

The square root of 12977619 is about 3602.4462522014. The cubic root of 12977619 is about 234.9984547959.

It can be divided in two parts, 129776 and 19, that added together give a triangular number (129795 = T₅₀₉).

The spelling of 12977619 in words is "twelve million, nine hundred seventy-seven thousand, six hundred nineteen".