857858723 has 2 divisors, whose sum is σ = 857858724. Its totient is φ = 857858722.

The previous prime is 857858717. The next prime is 857858747. The reversal of 857858723 is 327858758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 857858723 - 2⁸ = 857858467 is a prime.

It is not a weakly prime, because it can be changed into another prime (857858783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428929361 + 428929362.

It is an arithmetic number, because the mean of its divisors is an integer number (428929362).

Almost surely, 2^857858723 is an apocalyptic number.

857858723 is a deficient number, since it is larger than the sum of its proper divisors (1).

857858723 is an equidigital number, since it uses as much as digits as its factorization.

857858723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3763200, while the sum is 53.

The square root of 857858723 is about 29289.2253738469. The cubic root of 857858723 is about 950.1786267988.

The spelling of 857858723 in words is "eight hundred fifty-seven million, eight hundred fifty-eight thousand, seven hundred twenty-three".