247738823 has 2 divisors, whose sum is σ = 247738824. Its totient is φ = 247738822.

The previous prime is 247738789. The next prime is 247738831. The reversal of 247738823 is 328837742.

247738823 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 247738823 - 2¹⁴ = 247722439 is a prime.

It is a super-2 number, since 2×247738823² = 122749048842850658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247738723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123869411 + 123869412.

It is an arithmetic number, because the mean of its divisors is an integer number (123869412).

Almost surely, 2^247738823 is an apocalyptic number.

247738823 is a deficient number, since it is larger than the sum of its proper divisors (1).

247738823 is an equidigital number, since it uses as much as digits as its factorization.

247738823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 44.

The square root of 247738823 is about 15739.7211855865. The cubic root of 247738823 is about 628.0555002203.

The spelling of 247738823 in words is "two hundred forty-seven million, seven hundred thirty-eight thousand, eight hundred twenty-three".