12377857 has 2 divisors, whose sum is σ = 12377858. Its totient is φ = 12377856.

The previous prime is 12377843. The next prime is 12377861. The reversal of 12377857 is 75877321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8520561 + 3857296 = 2919^2 + 1964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12377857 is a prime.

It is a super-2 number, since 2×12377857² = 306422687824898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12377257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6188928 + 6188929.

It is an arithmetic number, because the mean of its divisors is an integer number (6188929).

Almost surely, 2^12377857 is an apocalyptic number.

It is an amenable number.

12377857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12377857 is an equidigital number, since it uses as much as digits as its factorization.

12377857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82320, while the sum is 40.

The square root of 12377857 is about 3518.2178727305. The cubic root of 12377857 is about 231.3210493154.

The spelling of 12377857 in words is "twelve million, three hundred seventy-seven thousand, eight hundred fifty-seven".