857004691 has 4 divisors (see below), whose sum is σ = 857835352. Its totient is φ = 856174032.

The previous prime is 857004689. The next prime is 857004779. The reversal of 857004691 is 196400758.

857004691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 857004691 - 2¹ = 857004689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857004661) 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, 413781 + ... + 415846.

It is an arithmetic number, because the mean of its divisors is an integer number (214458838).

Almost surely, 2^857004691 is an apocalyptic number.

857004691 is a deficient number, since it is larger than the sum of its proper divisors (830661).

857004691 is a wasteful number, since it uses less digits than its factorization.

857004691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830660.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 857004691 is about 29274.6424572530. The cubic root of 857004691 is about 949.8632087438.

The spelling of 857004691 in words is "eight hundred fifty-seven million, four thousand, six hundred ninety-one".