199479 has 24 divisors (see below), whose sum is σ = 328320. Its totient is φ = 107184.

The previous prime is 199457. The next prime is 199483. The reversal of 199479 is 974991.

199479 = 42² + 43² + ... + 87².

It is not a de Polignac number, because 199479 - 2⁵ = 199447 is a prime.

199479 is a lucky number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199429) 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, 3352 + ... + 3410.

It is an arithmetic number, because the mean of its divisors is an integer number (13680).

2¹⁹⁹⁴⁷⁹ is an apocalyptic number.

199479 is a deficient number, since it is larger than the sum of its proper divisors (128841).

199479 is a wasteful number, since it uses less digits than its factorization.

199479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 92 counting only the distinct ones).

The product of its digits is 20412, while the sum is 39.

The square root of 199479 is about 446.6307199466. The cubic root of 199479 is about 58.4295301646.

The spelling of 199479 in words is "one hundred ninety-nine thousand, four hundred seventy-nine".