109404187 has 2 divisors, whose sum is σ = 109404188. Its totient is φ = 109404186.

The previous prime is 109404179. The next prime is 109404221. The reversal of 109404187 is 781404901.

It is an a-pointer prime, because the next prime (109404221) can be obtained adding 109404187 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109404187 - 2³ = 109404179 is a prime.

It is a super-2 number, since 2×109404187² = 23938552266261938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (109404107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54702093 + 54702094.

It is an arithmetic number, because the mean of its divisors is an integer number (54702094).

Almost surely, 2^109404187 is an apocalyptic number.

109404187 is a deficient number, since it is larger than the sum of its proper divisors (1).

109404187 is an equidigital number, since it uses as much as digits as its factorization.

109404187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 109404187 is about 10459.6456440933. The cubic root of 109404187 is about 478.2753311268.

The spelling of 109404187 in words is "one hundred nine million, four hundred four thousand, one hundred eighty-seven".