12999377 has 4 divisors (see below), whose sum is σ = 13156080. Its totient is φ = 12842676.

The previous prime is 12999367. The next prime is 12999379. The reversal of 12999377 is 77399921.

12999377 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77399921 = 197 ⋅392893.

It is a cyclic number.

It is not a de Polignac number, because 12999377 - 2⁴ = 12999361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12999379) 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, 78227 + ... + 78392.

It is an arithmetic number, because the mean of its divisors is an integer number (3289020).

Almost surely, 2^12999377 is an apocalyptic number.

It is an amenable number.

12999377 is a deficient number, since it is larger than the sum of its proper divisors (156703).

12999377 is an equidigital number, since it uses as much as digits as its factorization.

12999377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156702.

The product of its digits is 214326, while the sum is 47.

The square root of 12999377 is about 3605.4648798733. The cubic root of 12999377 is about 235.1297126056.

The spelling of 12999377 in words is "twelve million, nine hundred ninety-nine thousand, three hundred seventy-seven".