312423109 has 2 divisors, whose sum is σ = 312423110. Its totient is φ = 312423108.

The previous prime is 312423107. The next prime is 312423131. The reversal of 312423109 is 901324213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240343009 + 72080100 = 15503^2 + 8490^2 .

It is an emirp because it is prime and its reverse (901324213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312423109 - 2¹ = 312423107 is a prime.

Together with 312423107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312423101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156211554 + 156211555.

It is an arithmetic number, because the mean of its divisors is an integer number (156211555).

Almost surely, 2^312423109 is an apocalyptic number.

It is an amenable number.

312423109 is a deficient number, since it is larger than the sum of its proper divisors (1).

312423109 is an equidigital number, since it uses as much as digits as its factorization.

312423109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 312423109 is about 17675.4945899683. The cubic root of 312423109 is about 678.5487424406.

The spelling of 312423109 in words is "three hundred twelve million, four hundred twenty-three thousand, one hundred nine".