989755 has 8 divisors (see below), whose sum is σ = 1279152. Its totient is φ = 730848.

The previous prime is 989753. The next prime is 989761. The reversal of 989755 is 557989.

989755 = T₁₄₁ + T₁₄₂ + ... + T₂₀₅.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989755 - 2¹ = 989753 is a prime.

It is a super-2 number, since 2×989755² = 1959229920050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7549 + ... + 7678.

It is an arithmetic number, because the mean of its divisors is an integer number (159894).

2⁹⁸⁹⁷⁵⁵ is an apocalyptic number.

989755 is a deficient number, since it is larger than the sum of its proper divisors (289397).

989755 is a wasteful number, since it uses less digits than its factorization.

989755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15245.

The product of its digits is 113400, while the sum is 43.

The square root of 989755 is about 994.8643123562. The cubic root of 989755 is about 99.6573270941.

The spelling of 989755 in words is "nine hundred eighty-nine thousand, seven hundred fifty-five".