857749741 has 4 divisors (see below), whose sum is σ = 895043232. Its totient is φ = 820456252.

The previous prime is 857749723. The next prime is 857749747. The reversal of 857749741 is 147947758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 857749741 - 2⁵ = 857749709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857749747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18646711 + ... + 18646756.

It is an arithmetic number, because the mean of its divisors is an integer number (223760808).

Almost surely, 2^857749741 is an apocalyptic number.

It is an amenable number.

857749741 is a deficient number, since it is larger than the sum of its proper divisors (37293491).

857749741 is a wasteful number, since it uses less digits than its factorization.

857749741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37293490.

The product of its digits is 1975680, while the sum is 52.

The square root of 857749741 is about 29287.3648695133. The cubic root of 857749741 is about 950.1383883346.

The spelling of 857749741 in words is "eight hundred fifty-seven million, seven hundred forty-nine thousand, seven hundred forty-one".