247808123 has 2 divisors, whose sum is σ = 247808124. Its totient is φ = 247808122.

The previous prime is 247808053. The next prime is 247808173. The reversal of 247808123 is 321808742.

247808123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247808123 - 2¹² = 247804027 is a prime.

It is a super-2 number, since 2×247808123² = 122817731649566258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247808173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123904061 + 123904062.

It is an arithmetic number, because the mean of its divisors is an integer number (123904062).

Almost surely, 2^247808123 is an apocalyptic number.

247808123 is a deficient number, since it is larger than the sum of its proper divisors (1).

247808123 is an equidigital number, since it uses as much as digits as its factorization.

247808123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 247808123 is about 15741.9224683645. The cubic root of 247808123 is about 628.1140567650.

The spelling of 247808123 in words is "two hundred forty-seven million, eight hundred eight thousand, one hundred twenty-three".