989261 has 12 divisors (see below), whose sum is σ = 1240092. Its totient is φ = 782208.

The previous prime is 989251. The next prime is 989279. The reversal of 989261 is 162989.

989261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 122500 + 866761 = 350^2 + 931^2 .

It is not a de Polignac number, because 989261 - 2¹⁰ = 988237 is a prime.

It is a super-2 number, since 2×989261² = 1957274652242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140 + ... + 1413.

It is an arithmetic number, because the mean of its divisors is an integer number (103341).

2⁹⁸⁹²⁶¹ is an apocalyptic number.

989261 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

989261 is a deficient number, since it is larger than the sum of its proper divisors (250831).

989261 is a wasteful number, since it uses less digits than its factorization.

989261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1573 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 989261 is about 994.6160063060. The cubic root of 989261 is about 99.6407442318.

The spelling of 989261 in words is "nine hundred eighty-nine thousand, two hundred sixty-one".