199090479 has 24 divisors (see below), whose sum is σ = 309623088. Its totient is φ = 113460480.

The previous prime is 199090477. The next prime is 199090483. The reversal of 199090479 is 974090991.

It is not a de Polignac number, because 199090479 - 2¹ = 199090477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199090471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60279 + ... + 63495.

It is an arithmetic number, because the mean of its divisors is an integer number (12900962).

Almost surely, 2^199090479 is an apocalyptic number.

199090479 is a deficient number, since it is larger than the sum of its proper divisors (110532609).

199090479 is a wasteful number, since it uses less digits than its factorization.

199090479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655 (or 3648 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 199090479 is about 14109.9425583522. The cubic root of 199090479 is about 583.9157152633.

The spelling of 199090479 in words is "one hundred ninety-nine million, ninety thousand, four hundred seventy-nine".