61098 has 16 divisors (see below), whose sum is σ = 129600. Its totient is φ = 19136.

The previous prime is 61091. The next prime is 61099. The reversal of 61098 is 89016.

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61091) 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, 198 + ... + 401.

It is an arithmetic number, because the mean of its divisors is an integer number (8100).

2⁶¹⁰⁹⁸ is an apocalyptic number.

61098 is an abundant number, since it is smaller than the sum of its proper divisors (68502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64800).

61098 is a wasteful number, since it uses less digits than its factorization.

61098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 61098 is about 247.1800962861. The cubic root of 61098 is about 39.3860412473.

The spelling of 61098 in words is "sixty-one thousand, ninety-eight".