109431137 has 2 divisors, whose sum is σ = 109431138. Its totient is φ = 109431136.

The previous prime is 109431131. The next prime is 109431139. The reversal of 109431137 is 731134901.

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., 80712256 + 28718881 = 8984^2 + 5359^2 .

It is a cyclic number.

It is not a de Polignac number, because 109431137 - 2¹² = 109427041 is a prime.

It is a super-2 number, since 2×109431137² = 23950347490225538, which contains 22 as substring.

Together with 109431139, 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 (109431131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54715568 + 54715569.

It is an arithmetic number, because the mean of its divisors is an integer number (54715569).

Almost surely, 2^109431137 is an apocalyptic number.

It is an amenable number.

109431137 is a deficient number, since it is larger than the sum of its proper divisors (1).

109431137 is an equidigital number, since it uses as much as digits as its factorization.

109431137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 109431137 is about 10460.9338493272. The cubic root of 109431137 is about 478.3145997700.

The spelling of 109431137 in words is "one hundred nine million, four hundred thirty-one thousand, one hundred thirty-seven".