989577 has 20 divisors (see below), whose sum is σ = 1558480. Its totient is φ = 624024.

The previous prime is 989561. The next prime is 989579. The reversal of 989577 is 775989.

989577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 989577 - 2⁴ = 989561 is a prime.

It is a super-3 number, since 3×989577³ = 2907167353330329099, which contains 333 as substring.

It is a Duffinian number.

989577 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (989579) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1218 + ... + 1860.

It is an arithmetic number, because the mean of its divisors is an integer number (77924).

2⁹⁸⁹⁵⁷⁷ is an apocalyptic number.

It is an amenable number.

989577 is a deficient number, since it is larger than the sum of its proper divisors (568903).

989577 is a wasteful number, since it uses less digits than its factorization.

989577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 665 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 989577 is about 994.7748488980. The cubic root of 989577 is about 99.6513525287.

The spelling of 989577 in words is "nine hundred eighty-nine thousand, five hundred seventy-seven".