12977799 has 4 divisors (see below), whose sum is σ = 17303736. Its totient is φ = 8651864.

The previous prime is 12977759. The next prime is 12977803. The reversal of 12977799 is 99777921.

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 12977799 - 2⁹ = 12977287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12977759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2162964 + ... + 2162969.

It is an arithmetic number, because the mean of its divisors is an integer number (4325934).

Almost surely, 2^12977799 is an apocalyptic number.

12977799 is a deficient number, since it is larger than the sum of its proper divisors (4325937).

12977799 is an equidigital number, since it uses as much as digits as its factorization.

12977799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4325936.

The product of its digits is 500094, while the sum is 51.

The square root of 12977799 is about 3602.4712351385. The cubic root of 12977799 is about 234.9995412697. Note that the first 3 decimals are identical.

The spelling of 12977799 in words is "twelve million, nine hundred seventy-seven thousand, seven hundred ninety-nine".