109898681 has 2 divisors, whose sum is σ = 109898682. Its totient is φ = 109898680.

The previous prime is 109898671. The next prime is 109898683. The reversal of 109898681 is 186898901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109725625 + 173056 = 10475^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 109898681 - 2²² = 105704377 is a prime.

It is a super-2 number, since 2×109898681² = 24155440171079522, which contains 22 as substring.

Together with 109898683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109898683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54949340 + 54949341.

It is an arithmetic number, because the mean of its divisors is an integer number (54949341).

Almost surely, 2^109898681 is an apocalyptic number.

It is an amenable number.

109898681 is a deficient number, since it is larger than the sum of its proper divisors (1).

109898681 is an equidigital number, since it uses as much as digits as its factorization.

109898681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 109898681 is about 10483.2571751341. The cubic root of 109898681 is about 478.9948308594.

The spelling of 109898681 in words is "one hundred nine million, eight hundred ninety-eight thousand, six hundred eighty-one".