12377691 has 14 divisors (see below), whose sum is σ = 18559140. Its totient is φ = 8251308.

The previous prime is 12377663. The next prime is 12377699. The reversal of 12377691 is 19677321.

It is a happy number.

It is not a de Polignac number, because 12377691 - 2⁹ = 12377179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12377699) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7761 + ... + 9218.

Almost surely, 2^12377691 is an apocalyptic number.

12377691 is a deficient number, since it is larger than the sum of its proper divisors (6181449).

12377691 is an frugal number, since it uses more digits than its factorization.

12377691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16997 (or 16982 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 12377691 is about 3518.1942811619. The cubic root of 12377691 is about 231.3200152251.

The spelling of 12377691 in words is "twelve million, three hundred seventy-seven thousand, six hundred ninety-one".