108315661 has 2 divisors, whose sum is σ = 108315662. Its totient is φ = 108315660.

The previous prime is 108315629. The next prime is 108315677. The reversal of 108315661 is 166513801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63840100 + 44475561 = 7990^2 + 6669^2 .

It is a cyclic number.

It is not a de Polignac number, because 108315661 - 2⁵ = 108315629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108315161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54157830 + 54157831.

It is an arithmetic number, because the mean of its divisors is an integer number (54157831).

Almost surely, 2^108315661 is an apocalyptic number.

It is an amenable number.

108315661 is a deficient number, since it is larger than the sum of its proper divisors (1).

108315661 is an equidigital number, since it uses as much as digits as its factorization.

108315661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 108315661 is about 10407.4810112726. The cubic root of 108315661 is about 476.6838278226.

The spelling of 108315661 in words is "one hundred eight million, three hundred fifteen thousand, six hundred sixty-one".