312995547349 has 2 divisors, whose sum is σ = 312995547350. Its totient is φ = 312995547348.

The previous prime is 312995547233. The next prime is 312995547409. The reversal of 312995547349 is 943745599213.

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., 185059134225 + 127936413124 = 430185^2 + 357682^2 .

It is a cyclic number.

It is not a de Polignac number, because 312995547349 - 2⁹ = 312995546837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312995547149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156497773674 + 156497773675.

It is an arithmetic number, because the mean of its divisors is an integer number (156497773675).

Almost surely, 2^312995547349 is an apocalyptic number.

It is an amenable number.

312995547349 is a deficient number, since it is larger than the sum of its proper divisors (1).

312995547349 is an equidigital number, since it uses as much as digits as its factorization.

312995547349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36741600, while the sum is 61.

The spelling of 312995547349 in words is "three hundred twelve billion, nine hundred ninety-five million, five hundred forty-seven thousand, three hundred forty-nine".