247344263 has 2 divisors, whose sum is σ = 247344264. Its totient is φ = 247344262.

The previous prime is 247344259. The next prime is 247344281. The reversal of 247344263 is 362443742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247344263 - 2² = 247344259 is a prime.

It is a super-2 number, since 2×247344263² = 122358368878026338, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_13541858 and since 247344263 and 13541858 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247344563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123672131 + 123672132.

It is an arithmetic number, because the mean of its divisors is an integer number (123672132).

Almost surely, 2^247344263 is an apocalyptic number.

247344263 is a deficient number, since it is larger than the sum of its proper divisors (1).

247344263 is an equidigital number, since it uses as much as digits as its factorization.

247344263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 35.

The square root of 247344263 is about 15727.1822969024. The cubic root of 247344263 is about 627.7218999026.

The spelling of 247344263 in words is "two hundred forty-seven million, three hundred forty-four thousand, two hundred sixty-three".