190105917 has 16 divisors (see below), whose sum is σ = 269583552. Its totient is φ = 118749440.

The previous prime is 190105897. The next prime is 190105957. The reversal of 190105917 is 719501091.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 190105917 - 2¹¹ = 190103869 is a prime.

It is a super-2 number, since 2×190105917² = 72280519356821778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190105957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3367 + ... + 19787.

It is an arithmetic number, because the mean of its divisors is an integer number (16848972).

Almost surely, 2^190105917 is an apocalyptic number.

190105917 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

190105917 is a deficient number, since it is larger than the sum of its proper divisors (79477635).

190105917 is a wasteful number, since it uses less digits than its factorization.

190105917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16668.

The product of its (nonzero) digits is 2835, while the sum is 33.

The square root of 190105917 is about 13787.8902301984. The cubic root of 190105917 is about 574.9965136525.

The spelling of 190105917 in words is "one hundred ninety million, one hundred five thousand, nine hundred seventeen".