109343989 has 2 divisors, whose sum is σ = 109343990. Its totient is φ = 109343988.

The previous prime is 109343987. The next prime is 109344013. The reversal of 109343989 is 989343901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106956964 + 2387025 = 10342^2 + 1545^2 .

It is a cyclic number.

It is not a de Polignac number, because 109343989 - 2¹ = 109343987 is a prime.

It is a super-2 number, since 2×109343989² = 23912215860864242, which contains 22 as substring.

Together with 109343987, 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 (109343987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54671994 + 54671995.

It is an arithmetic number, because the mean of its divisors is an integer number (54671995).

Almost surely, 2^109343989 is an apocalyptic number.

It is an amenable number.

109343989 is a deficient number, since it is larger than the sum of its proper divisors (1).

109343989 is an equidigital number, since it uses as much as digits as its factorization.

109343989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 109343989 is about 10456.7676171941. The cubic root of 109343989 is about 478.1875937759.

The spelling of 109343989 in words is "one hundred nine million, three hundred forty-three thousand, nine hundred eighty-nine".