199739734 has 4 divisors (see below), whose sum is σ = 299609604. Its totient is φ = 99869866.

The previous prime is 199739731. The next prime is 199739747. The reversal of 199739734 is 437937991.

It is a happy number.

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

It is a super-2 number, since 2×199739734² = 79791922676781512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199739731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49934932 + ... + 49934935.

It is an arithmetic number, because the mean of its divisors is an integer number (74902401).

Almost surely, 2^199739734 is an apocalyptic number.

199739734 is a deficient number, since it is larger than the sum of its proper divisors (99869870).

199739734 is an equidigital number, since it uses as much as digits as its factorization.

199739734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99869869.

The product of its digits is 1285956, while the sum is 52.

The square root of 199739734 is about 14132.9308354637. The cubic root of 199739734 is about 584.5497633915.

The spelling of 199739734 in words is "one hundred ninety-nine million, seven hundred thirty-nine thousand, seven hundred thirty-four".