199105023 has 16 divisors (see below), whose sum is σ = 286354656. Its totient is φ = 122328960.

The previous prime is 199105001. The next prime is 199105051. The reversal of 199105023 is 320501991.

It is not a de Polignac number, because 199105023 - 2¹² = 199100927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199105063) 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, 22633 + ... + 30173.

It is an arithmetic number, because the mean of its divisors is an integer number (17897166).

Almost surely, 2^199105023 is an apocalyptic number.

199105023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

199105023 is a deficient number, since it is larger than the sum of its proper divisors (87249633).

199105023 is a wasteful number, since it uses less digits than its factorization.

199105023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8234.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 199105023 is about 14110.4579302020. The cubic root of 199105023 is about 583.9299336954.

The spelling of 199105023 in words is "one hundred ninety-nine million, one hundred five thousand, twenty-three".