98690681 has 4 divisors (see below), whose sum is σ = 98970612. Its totient is φ = 98410752.

The previous prime is 98690653. The next prime is 98690687. The reversal of 98690681 is 18609689.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29800681 + 68890000 = 5459^2 + 8300^2 .

It is not a de Polignac number, because 98690681 - 2¹⁴ = 98674297 is a prime.

It is a super-2 number, since 2×98690681² = 19479701032487522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (98690687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139436 + ... + 140141.

It is an arithmetic number, because the mean of its divisors is an integer number (24742653).

Almost surely, 2^98690681 is an apocalyptic number.

It is an amenable number.

98690681 is a deficient number, since it is larger than the sum of its proper divisors (279931).

98690681 is a wasteful number, since it uses less digits than its factorization.

98690681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279930.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 98690681 is about 9934.3183460165. The cubic root of 98690681 is about 462.1242037207.

The spelling of 98690681 in words is "ninety-eight million, six hundred ninety thousand, six hundred eighty-one".