312339949 has 2 divisors, whose sum is σ = 312339950. Its totient is φ = 312339948.

The previous prime is 312339943. The next prime is 312339953. The reversal of 312339949 is 949933213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310393924 + 1946025 = 17618^2 + 1395^2 .

It is an emirp because it is prime and its reverse (949933213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312339949 - 2¹¹ = 312337901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312339943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156169974 + 156169975.

It is an arithmetic number, because the mean of its divisors is an integer number (156169975).

Almost surely, 2^312339949 is an apocalyptic number.

It is an amenable number.

312339949 is a deficient number, since it is larger than the sum of its proper divisors (1).

312339949 is an equidigital number, since it uses as much as digits as its factorization.

312339949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 43.

The square root of 312339949 is about 17673.1420239866. The cubic root of 312339949 is about 678.4885322970.

The spelling of 312339949 in words is "three hundred twelve million, three hundred thirty-nine thousand, nine hundred forty-nine".