312729247 has 2 divisors, whose sum is σ = 312729248. Its totient is φ = 312729246.

The previous prime is 312729233. The next prime is 312729253. The reversal of 312729247 is 742927213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312729247 - 2⁷ = 312729119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312729947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156364623 + 156364624.

It is an arithmetic number, because the mean of its divisors is an integer number (156364624).

Almost surely, 2^312729247 is an apocalyptic number.

312729247 is a deficient number, since it is larger than the sum of its proper divisors (1).

312729247 is an equidigital number, since it uses as much as digits as its factorization.

312729247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 312729247 is about 17684.1524252648. The cubic root of 312729247 is about 678.7703028135.

The spelling of 312729247 in words is "three hundred twelve million, seven hundred twenty-nine thousand, two hundred forty-seven".