109194887 has 2 divisors, whose sum is σ = 109194888. Its totient is φ = 109194886.

The previous prime is 109194857. The next prime is 109194907. The reversal of 109194887 is 788491901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109194887 - 2¹² = 109190791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109194857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54597443 + 54597444.

It is an arithmetic number, because the mean of its divisors is an integer number (54597444).

Almost surely, 2^109194887 is an apocalyptic number.

109194887 is a deficient number, since it is larger than the sum of its proper divisors (1).

109194887 is an equidigital number, since it uses as much as digits as its factorization.

109194887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 109194887 is about 10449.6357352780. The cubic root of 109194887 is about 477.9701419233.

The spelling of 109194887 in words is "one hundred nine million, one hundred ninety-four thousand, eight hundred eighty-seven".