199309734 has 160 divisors (see below), whose sum is σ = 537878880. Its totient is φ = 54494208.

The previous prime is 199309727. The next prime is 199309741. The reversal of 199309734 is 437903991.

It is an interprime number because it is at equal distance from previous prime (199309727) and next prime (199309741).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199309734.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 680092 + ... + 680384.

It is an arithmetic number, because the mean of its divisors is an integer number (3361743).

Almost surely, 2^199309734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199309734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268939440).

199309734 is an abundant number, since it is smaller than the sum of its proper divisors (338569146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199309734 is a wasteful number, since it uses less digits than its factorization.

199309734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 199309734 is about 14117.7099417717. The cubic root of 199309734 is about 584.1299888133.

The spelling of 199309734 in words is "one hundred ninety-nine million, three hundred nine thousand, seven hundred thirty-four".