839494723 has 2 divisors, whose sum is σ = 839494724. Its totient is φ = 839494722.

The previous prime is 839494603. The next prime is 839494751. The reversal of 839494723 is 327494938.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-839494723 is a prime.

It is not a weakly prime, because it can be changed into another prime (839494823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419747361 + 419747362.

It is an arithmetic number, because the mean of its divisors is an integer number (419747362).

Almost surely, 2^839494723 is an apocalyptic number.

839494723 is a deficient number, since it is larger than the sum of its proper divisors (1).

839494723 is an equidigital number, since it uses as much as digits as its factorization.

839494723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 49.

The square root of 839494723 is about 28974.0353247524. The cubic root of 839494723 is about 943.3495722238.

The spelling of 839494723 in words is "eight hundred thirty-nine million, four hundred ninety-four thousand, seven hundred twenty-three".