123800839 has 2 divisors, whose sum is σ = 123800840. Its totient is φ = 123800838.

The previous prime is 123800813. The next prime is 123800861. The reversal of 123800839 is 938008321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123800839 - 2⁷ = 123800711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123807839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61900419 + 61900420.

It is an arithmetic number, because the mean of its divisors is an integer number (61900420).

Almost surely, 2^123800839 is an apocalyptic number.

123800839 is a deficient number, since it is larger than the sum of its proper divisors (1).

123800839 is an equidigital number, since it uses as much as digits as its factorization.

123800839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 123800839 is about 11126.5825391267. The cubic root of 123800839 is about 498.3959783987.

The spelling of 123800839 in words is "one hundred twenty-three million, eight hundred thousand, eight hundred thirty-nine".