857940983 has 4 divisors (see below), whose sum is σ = 858072960. Its totient is φ = 857809008.

The previous prime is 857940977. The next prime is 857940997. The reversal of 857940983 is 389049758.

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 857940983 - 2¹⁰ = 857939959 is a prime.

It is a super-2 number, since 2×857940983² = 1472125460622012578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857942983) 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 in 3 ways as a sum of consecutive naturals, for example, 55703 + ... + 69416.

It is an arithmetic number, because the mean of its divisors is an integer number (214518240).

Almost surely, 2^857940983 is an apocalyptic number.

857940983 is a deficient number, since it is larger than the sum of its proper divisors (131977).

857940983 is a wasteful number, since it uses less digits than its factorization.

857940983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131976.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 857940983 is about 29290.6296108500. The cubic root of 857940983 is about 950.2089966774.

The spelling of 857940983 in words is "eight hundred fifty-seven million, nine hundred forty thousand, nine hundred eighty-three".