12393977 has 4 divisors (see below), whose sum is σ = 12401040. Its totient is φ = 12386916.

The previous prime is 12393971. The next prime is 12394007. The reversal of 12393977 is 77939321.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 77939321 = 6151 ⋅12671.

It is a cyclic number.

It is not a de Polignac number, because 12393977 - 2¹⁰ = 12392953 is a prime.

It is a super-2 number, since 2×12393977² = 307221331753058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12393971) 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, 1358 + ... + 5160.

It is an arithmetic number, because the mean of its divisors is an integer number (3100260).

Almost surely, 2^12393977 is an apocalyptic number.

It is an amenable number.

12393977 is a deficient number, since it is larger than the sum of its proper divisors (7063).

12393977 is an equidigital number, since it uses as much as digits as its factorization.

12393977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062.

The product of its digits is 71442, while the sum is 41.

The square root of 12393977 is about 3520.5080599254. The cubic root of 12393977 is about 231.4214241956.

The spelling of 12393977 in words is "twelve million, three hundred ninety-three thousand, nine hundred seventy-seven".