108994661 has 2 divisors, whose sum is σ = 108994662. Its totient is φ = 108994660.

The previous prime is 108994657. The next prime is 108994663. The reversal of 108994661 is 166499801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65302561 + 43692100 = 8081^2 + 6610^2 .

It is a cyclic number.

It is not a de Polignac number, because 108994661 - 2² = 108994657 is a prime.

It is a super-2 number, since 2×108994661² = 23759672253009842, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 108994663, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108994663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54497330 + 54497331.

It is an arithmetic number, because the mean of its divisors is an integer number (54497331).

Almost surely, 2^108994661 is an apocalyptic number.

It is an amenable number.

108994661 is a deficient number, since it is larger than the sum of its proper divisors (1).

108994661 is an equidigital number, since it uses as much as digits as its factorization.

108994661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 108994661 is about 10440.0508140526. The cubic root of 108994661 is about 477.6778186994.

The spelling of 108994661 in words is "one hundred eight million, nine hundred ninety-four thousand, six hundred sixty-one".