989082857 has 4 divisors (see below), whose sum is σ = 1130380416. Its totient is φ = 847785300.

The previous prime is 989082851. The next prime is 989082883. The reversal of 989082857 is 758280989.

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 989082857 - 2¹⁶ = 989017321 is a prime.

It is a super-2 number, since 2×989082857² = 1956569796022564898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989082851) 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, 70648769 + ... + 70648782.

It is an arithmetic number, because the mean of its divisors is an integer number (282595104).

Almost surely, 2^989082857 is an apocalyptic number.

It is an amenable number.

989082857 is a deficient number, since it is larger than the sum of its proper divisors (141297559).

989082857 is a wasteful number, since it uses less digits than its factorization.

989082857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141297558.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The square root of 989082857 is about 31449.6877091013. The cubic root of 989082857 is about 996.3476287583.

The spelling of 989082857 in words is "nine hundred eighty-nine million, eighty-two thousand, eight hundred fifty-seven".