98161681 has 4 divisors (see below), whose sum is σ = 98194672. Its totient is φ = 98128692.

The previous prime is 98161673. The next prime is 98161699. The reversal of 98161681 is 18616189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18616189 = 443 ⋅42023.

It is a cyclic number.

It is not a de Polignac number, because 98161681 - 2³ = 98161673 is a prime.

It is a super-2 number, since 2×98161681² = 19271431233491522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98161981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11535 + ... + 18148.

It is an arithmetic number, because the mean of its divisors is an integer number (24548668).

Almost surely, 2^98161681 is an apocalyptic number.

It is an amenable number.

98161681 is a deficient number, since it is larger than the sum of its proper divisors (32991).

98161681 is a wasteful number, since it uses less digits than its factorization.

98161681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32990.

The product of its digits is 20736, while the sum is 40.

The square root of 98161681 is about 9907.6576949348. The cubic root of 98161681 is about 461.2970341013.

The spelling of 98161681 in words is "ninety-eight million, one hundred sixty-one thousand, six hundred eighty-one".