109398681 has 40 divisors (see below), whose sum is σ = 189890624. Its totient is φ = 61469280.

The previous prime is 109398673. The next prime is 109398683. The reversal of 109398681 is 186893901.

It is not a de Polignac number, because 109398681 - 2³ = 109398673 is a prime.

It is a super-2 number, since 2×109398681² = 23936142809079522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (109398683) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33006 + ... + 36168.

Almost surely, 2^109398681 is an apocalyptic number.

It is an amenable number.

109398681 is a deficient number, since it is larger than the sum of its proper divisors (80491943).

109398681 is an equidigital number, since it uses as much as digits as its factorization.

109398681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243 (or 3234 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 109398681 is about 10459.3824387485. The cubic root of 109398681 is about 478.2673075822.

The spelling of 109398681 in words is "one hundred nine million, three hundred ninety-eight thousand, six hundred eighty-one".