312539977 has 2 divisors, whose sum is σ = 312539978. Its totient is φ = 312539976.

The previous prime is 312539957. The next prime is 312540023. The reversal of 312539977 is 779935213.

It is an a-pointer prime, because the next prime (312540023) can be obtained adding 312539977 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307791936 + 4748041 = 17544^2 + 2179^2 .

It is a cyclic number.

It is not a de Polignac number, because 312539977 - 2¹⁹ = 312015689 is a prime.

It is not a weakly prime, because it can be changed into another prime (312539947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156269988 + 156269989.

It is an arithmetic number, because the mean of its divisors is an integer number (156269989).

Almost surely, 2^312539977 is an apocalyptic number.

It is an amenable number.

312539977 is a deficient number, since it is larger than the sum of its proper divisors (1).

312539977 is an equidigital number, since it uses as much as digits as its factorization.

312539977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357210, while the sum is 46.

The square root of 312539977 is about 17678.8002138154. The cubic root of 312539977 is about 678.6333400544.

The spelling of 312539977 in words is "three hundred twelve million, five hundred thirty-nine thousand, nine hundred seventy-seven".