98581861 has 32 divisors (see below), whose sum is σ = 127872000. Its totient is φ = 73965312.

The previous prime is 98581853. The next prime is 98581877. The reversal of 98581861 is 16818589.

98581861 is a nontrivial binomial coefficient, being equal to C(14042, 2).

It is a cyclic number.

It is not a de Polignac number, because 98581861 - 2³ = 98581853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98281861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133030 + ... + 133768.

It is an arithmetic number, because the mean of its divisors is an integer number (3996000).

Almost surely, 2^98581861 is an apocalyptic number.

98581861 is the 14041-st triangular number and also the 7021-st hexagonal number.

98581861 is the 4681-st centered nonagonal number.

It is an amenable number.

98581861 is a deficient number, since it is larger than the sum of its proper divisors (29290139).

98581861 is a wasteful number, since it uses less digits than its factorization.

98581861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841.

The product of its digits is 138240, while the sum is 46.

The square root of 98581861 is about 9928.8398617361. The cubic root of 98581861 is about 461.9542895000.

The spelling of 98581861 in words is "ninety-eight million, five hundred eighty-one thousand, eight hundred sixty-one".