312775109 has 2 divisors, whose sum is σ = 312775110. Its totient is φ = 312775108.

The previous prime is 312775087. The next prime is 312775123. The reversal of 312775109 is 901577213.

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., 293608225 + 19166884 = 17135^2 + 4378^2 .

It is a cyclic number.

It is not a de Polignac number, because 312775109 - 2¹² = 312771013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312775139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156387554 + 156387555.

It is an arithmetic number, because the mean of its divisors is an integer number (156387555).

Almost surely, 2^312775109 is an apocalyptic number.

It is an amenable number.

312775109 is a deficient number, since it is larger than the sum of its proper divisors (1).

312775109 is an equidigital number, since it uses as much as digits as its factorization.

312775109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 312775109 is about 17685.4490754405. The cubic root of 312775109 is about 678.8034819318.

The spelling of 312775109 in words is "three hundred twelve million, seven hundred seventy-five thousand, one hundred nine".