247042319 has 2 divisors, whose sum is σ = 247042320. Its totient is φ = 247042318.

The previous prime is 247042309. The next prime is 247042339. The reversal of 247042319 is 913240742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247042319 - 2²⁰ = 245993743 is a prime.

It is a super-2 number, since 2×247042319² = 122059814753795522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247042309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123521159 + 123521160.

It is an arithmetic number, because the mean of its divisors is an integer number (123521160).

Almost surely, 2^247042319 is an apocalyptic number.

247042319 is a deficient number, since it is larger than the sum of its proper divisors (1).

247042319 is an equidigital number, since it uses as much as digits as its factorization.

247042319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 247042319 is about 15717.5799345828. The cubic root of 247042319 is about 627.4663666677.

The spelling of 247042319 in words is "two hundred forty-seven million, forty-two thousand, three hundred nineteen".