857635147 has 2 divisors, whose sum is σ = 857635148. Its totient is φ = 857635146.

The previous prime is 857635117. The next prime is 857635189. The reversal of 857635147 is 741536758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 857635147 - 2⁷ = 857635019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 857635097 and 857635106.

It is not a weakly prime, because it can be changed into another prime (857635117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428817573 + 428817574.

It is an arithmetic number, because the mean of its divisors is an integer number (428817574).

Almost surely, 2^857635147 is an apocalyptic number.

857635147 is a deficient number, since it is larger than the sum of its proper divisors (1).

857635147 is an equidigital number, since it uses as much as digits as its factorization.

857635147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 46.

The square root of 857635147 is about 29285.4084315039. The cubic root of 857635147 is about 950.0960741248.

The spelling of 857635147 in words is "eight hundred fifty-seven million, six hundred thirty-five thousand, one hundred forty-seven".