12988977 has 4 divisors (see below), whose sum is σ = 17318640. Its totient is φ = 8659316.

The previous prime is 12988957. The next prime is 12989017. The reversal of 12988977 is 77988921.

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: 77988921 = 3 ⋅25996307.

It is a cyclic number.

It is not a de Polignac number, because 12988977 - 2⁷ = 12988849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12988957) 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, 2164827 + ... + 2164832.

It is an arithmetic number, because the mean of its divisors is an integer number (4329660).

Almost surely, 2^12988977 is an apocalyptic number.

It is an amenable number.

12988977 is a deficient number, since it is larger than the sum of its proper divisors (4329663).

12988977 is an equidigital number, since it uses as much as digits as its factorization.

12988977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329662.

The product of its digits is 508032, while the sum is 51.

The square root of 12988977 is about 3604.0223362238. The cubic root of 12988977 is about 235.0669916146.

The spelling of 12988977 in words is "twelve million, nine hundred eighty-eight thousand, nine hundred seventy-seven".