2857457123 has 2 divisors, whose sum is σ = 2857457124. Its totient is φ = 2857457122.

The previous prime is 2857457081. The next prime is 2857457171. The reversal of 2857457123 is 3217547582.

2857457123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2857457123 is a prime.

It is a super-2 number, since 2×2857457123² = 16330122419566874258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2857457173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428728561 + 1428728562.

It is an arithmetic number, because the mean of its divisors is an integer number (1428728562).

Almost surely, 2^2857457123 is an apocalyptic number.

2857457123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857457123 is an equidigital number, since it uses as much as digits as its factorization.

2857457123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470400, while the sum is 44.

The square root of 2857457123 is about 53455.1879895675. The cubic root of 2857457123 is about 1419.0354361675.

The spelling of 2857457123 in words is "two billion, eight hundred fifty-seven million, four hundred fifty-seven thousand, one hundred twenty-three".