109161389 has 2 divisors, whose sum is σ = 109161390. Its totient is φ = 109161388.

The previous prime is 109161343. The next prime is 109161407. The reversal of 109161389 is 983161901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109035364 + 126025 = 10442^2 + 355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109161389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109161089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54580694 + 54580695.

It is an arithmetic number, because the mean of its divisors is an integer number (54580695).

Almost surely, 2^109161389 is an apocalyptic number.

It is an amenable number.

109161389 is a deficient number, since it is larger than the sum of its proper divisors (1).

109161389 is an equidigital number, since it uses as much as digits as its factorization.

109161389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 109161389 is about 10448.0327813421. The cubic root of 109161389 is about 477.9212608759.

The spelling of 109161389 in words is "one hundred nine million, one hundred sixty-one thousand, three hundred eighty-nine".