12377861 has 2 divisors, whose sum is σ = 12377862. Its totient is φ = 12377860.

The previous prime is 12377857. The next prime is 12377881. The reversal of 12377861 is 16877321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10764961 + 1612900 = 3281^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 12377861 - 2² = 12377857 is a prime.

It is a super-2 number, since 2×12377861² = 306422885870642, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12377881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6188930 + 6188931.

It is an arithmetic number, because the mean of its divisors is an integer number (6188931).

Almost surely, 2^12377861 is an apocalyptic number.

It is an amenable number.

12377861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12377861 is an equidigital number, since it uses as much as digits as its factorization.

12377861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 12377861 is about 3518.2184412000. The cubic root of 12377861 is about 231.3210742331.

The spelling of 12377861 in words is "twelve million, three hundred seventy-seven thousand, eight hundred sixty-one".