199495479 has 16 divisors (see below), whose sum is σ = 268150752. Its totient is φ = 131923968.

The previous prime is 199495477. The next prime is 199495507. The reversal of 199495479 is 974594991.

It is not a de Polignac number, because 199495479 - 2¹ = 199495477 is a prime.

It is a super-2 number, since 2×199495479² = 79596892282878882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199495477) 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, 271797 + ... + 272529.

It is an arithmetic number, because the mean of its divisors is an integer number (16759422).

Almost surely, 2^199495479 is an apocalyptic number.

199495479 is a deficient number, since it is larger than the sum of its proper divisors (68655273).

199495479 is a wasteful number, since it uses less digits than its factorization.

199495479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346.

The product of its digits is 3674160, while the sum is 57.

The square root of 199495479 is about 14124.2868492537. The cubic root of 199495479 is about 584.3113907867.

The spelling of 199495479 in words is "one hundred ninety-nine million, four hundred ninety-five thousand, four hundred seventy-nine".