98161821 has 8 divisors (see below), whose sum is σ = 145424960. Its totient is φ = 65441196.

The previous prime is 98161813. The next prime is 98161829. The reversal of 98161821 is 12816189.

It is an interprime number because it is at equal distance from previous prime (98161813) and next prime (98161829).

It is not a de Polignac number, because 98161821 - 2³ = 98161813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98161829) 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, 1817785 + ... + 1817838.

It is an arithmetic number, because the mean of its divisors is an integer number (18178120).

Almost surely, 2^98161821 is an apocalyptic number.

It is an amenable number.

98161821 is a deficient number, since it is larger than the sum of its proper divisors (47263139).

98161821 is a wasteful number, since it uses less digits than its factorization.

98161821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635632 (or 3635626 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 98161821 is about 9907.6647601743. The cubic root of 98161821 is about 461.2972534046.

The spelling of 98161821 in words is "ninety-eight million, one hundred sixty-one thousand, eight hundred twenty-one".