857489701 has 2 divisors, whose sum is σ = 857489702. Its totient is φ = 857489700.

The previous prime is 857489693. The next prime is 857489747. The reversal of 857489701 is 107984758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 854159076 + 3330625 = 29226^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 857489701 - 2³ = 857489693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857481701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428744850 + 428744851.

It is an arithmetic number, because the mean of its divisors is an integer number (428744851).

Almost surely, 2^857489701 is an apocalyptic number.

It is an amenable number.

857489701 is a deficient number, since it is larger than the sum of its proper divisors (1).

857489701 is an equidigital number, since it uses as much as digits as its factorization.

857489701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 857489701 is about 29282.9250758868. The cubic root of 857489701 is about 950.0423622845.

The spelling of 857489701 in words is "eight hundred fifty-seven million, four hundred eighty-nine thousand, seven hundred one".