857739901 has 2 divisors, whose sum is σ = 857739902. Its totient is φ = 857739900.

The previous prime is 857739859. The next prime is 857739907. The reversal of 857739901 is 109937758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461132676 + 396607225 = 21474^2 + 19915^2 .

It is a cyclic number.

It is not a de Polignac number, because 857739901 - 2²⁵ = 824185469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857739907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428869950 + 428869951.

It is an arithmetic number, because the mean of its divisors is an integer number (428869951).

Almost surely, 2^857739901 is an apocalyptic number.

It is an amenable number.

857739901 is a deficient number, since it is larger than the sum of its proper divisors (1).

857739901 is an equidigital number, since it uses as much as digits as its factorization.

857739901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 857739901 is about 29287.1968784997. The cubic root of 857739901 is about 950.1347550303.

The spelling of 857739901 in words is "eight hundred fifty-seven million, seven hundred thirty-nine thousand, nine hundred one".