12431977 has 2 divisors, whose sum is σ = 12431978. Its totient is φ = 12431976.

The previous prime is 12431971. The next prime is 12432011. The reversal of 12431977 is 77913421.

It is an a-pointer prime, because the next prime (12432011) can be obtained adding 12431977 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7123561 + 5308416 = 2669^2 + 2304^2 .

It is an emirp because it is prime and its reverse (77913421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12431977 - 2⁷ = 12431849 is a prime.

It is not a weakly prime, because it can be changed into another prime (12431971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6215988 + 6215989.

It is an arithmetic number, because the mean of its divisors is an integer number (6215989).

Almost surely, 2^12431977 is an apocalyptic number.

It is an amenable number.

12431977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12431977 is an equidigital number, since it uses as much as digits as its factorization.

12431977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 12431977 is about 3525.9008777900. The cubic root of 12431977 is about 231.6576959992.

The spelling of 12431977 in words is "twelve million, four hundred thirty-one thousand, nine hundred seventy-seven".