199829431 has 4 divisors (see below), whose sum is σ = 199872864. Its totient is φ = 199786000.

The previous prime is 199829393. The next prime is 199829437. The reversal of 199829431 is 134928991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199829431 - 2¹³ = 199821239 is a prime.

It is a super-2 number, since 2×199829431² = 79863602987567522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199829437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13870 + ... + 24331.

It is an arithmetic number, because the mean of its divisors is an integer number (49968216).

Almost surely, 2^199829431 is an apocalyptic number.

199829431 is a deficient number, since it is larger than the sum of its proper divisors (43433).

199829431 is an equidigital number, since it uses as much as digits as its factorization.

199829431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43432.

The product of its digits is 139968, while the sum is 46.

The square root of 199829431 is about 14136.1038125786. The cubic root of 199829431 is about 584.6372514314.

The spelling of 199829431 in words is "one hundred ninety-nine million, eight hundred twenty-nine thousand, four hundred thirty-one".