247669663 has 2 divisors, whose sum is σ = 247669664. Its totient is φ = 247669662.

The previous prime is 247669621. The next prime is 247669679. The reversal of 247669663 is 366966742.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247669663 is a prime.

It is a super-2 number, since 2×247669663² = 122680523941067138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247669603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123834831 + 123834832.

It is an arithmetic number, because the mean of its divisors is an integer number (123834832).

Almost surely, 2^247669663 is an apocalyptic number.

247669663 is a deficient number, since it is larger than the sum of its proper divisors (1).

247669663 is an equidigital number, since it uses as much as digits as its factorization.

247669663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 49.

The square root of 247669663 is about 15737.5240428728. The cubic root of 247669663 is about 627.9970510836.

The spelling of 247669663 in words is "two hundred forty-seven million, six hundred sixty-nine thousand, six hundred sixty-three".