109131641 has 2 divisors, whose sum is σ = 109131642. Its totient is φ = 109131640.

The previous prime is 109131599. The next prime is 109131643. The reversal of 109131641 is 146131901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74321641 + 34810000 = 8621^2 + 5900^2 .

It is an emirp because it is prime and its reverse (146131901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109131641 - 2⁶ = 109131577 is a prime.

Together with 109131643, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109131641.

It is not a weakly prime, because it can be changed into another prime (109131643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54565820 + 54565821.

It is an arithmetic number, because the mean of its divisors is an integer number (54565821).

Almost surely, 2^109131641 is an apocalyptic number.

It is an amenable number.

109131641 is a deficient number, since it is larger than the sum of its proper divisors (1).

109131641 is an equidigital number, since it uses as much as digits as its factorization.

109131641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 109131641 is about 10446.6090670609. The cubic root of 109131641 is about 477.8778435301.

The spelling of 109131641 in words is "one hundred nine million, one hundred thirty-one thousand, six hundred forty-one".