108345661 has 2 divisors, whose sum is σ = 108345662. Its totient is φ = 108345660.

The previous prime is 108345659. The next prime is 108345689. The reversal of 108345661 is 166543801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80192025 + 28153636 = 8955^2 + 5306^2 .

It is an emirp because it is prime and its reverse (166543801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108345661 - 2¹ = 108345659 is a prime.

Together with 108345659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108345691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54172830 + 54172831.

It is an arithmetic number, because the mean of its divisors is an integer number (54172831).

Almost surely, 2^108345661 is an apocalyptic number.

It is an amenable number.

108345661 is a deficient number, since it is larger than the sum of its proper divisors (1).

108345661 is an equidigital number, since it uses as much as digits as its factorization.

108345661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 108345661 is about 10408.9221824356. The cubic root of 108345661 is about 476.7278325234.

The spelling of 108345661 in words is "one hundred eight million, three hundred forty-five thousand, six hundred sixty-one".