312636229 has 2 divisors, whose sum is σ = 312636230. Its totient is φ = 312636228.

The previous prime is 312636197. The next prime is 312636251. The reversal of 312636229 is 922636213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251952129 + 60684100 = 15873^2 + 7790^2 .

It is a cyclic number.

It is not a de Polignac number, because 312636229 - 2⁵ = 312636197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312636194 and 312636203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312636629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156318114 + 156318115.

It is an arithmetic number, because the mean of its divisors is an integer number (156318115).

Almost surely, 2^312636229 is an apocalyptic number.

It is an amenable number.

312636229 is a deficient number, since it is larger than the sum of its proper divisors (1).

312636229 is an equidigital number, since it uses as much as digits as its factorization.

312636229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 34.

The square root of 312636229 is about 17681.5222478157. The cubic root of 312636229 is about 678.7029984626.

The spelling of 312636229 in words is "three hundred twelve million, six hundred thirty-six thousand, two hundred twenty-nine".