247212319 has 2 divisors, whose sum is σ = 247212320. Its totient is φ = 247212318.

The previous prime is 247212293. The next prime is 247212337. The reversal of 247212319 is 913212742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247212319 - 2⁷ = 247212191 is a prime.

It is a super-2 number, since 2×247212319² = 122227861330715522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247212359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123606159 + 123606160.

It is an arithmetic number, because the mean of its divisors is an integer number (123606160).

Almost surely, 2^247212319 is an apocalyptic number.

247212319 is a deficient number, since it is larger than the sum of its proper divisors (1).

247212319 is an equidigital number, since it uses as much as digits as its factorization.

247212319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 247212319 is about 15722.9869617703. The cubic root of 247212319 is about 627.6102621539.

The spelling of 247212319 in words is "two hundred forty-seven million, two hundred twelve thousand, three hundred nineteen".