199933745 has 12 divisors (see below), whose sum is σ = 263715060. Its totient is φ = 145405920.

The previous prime is 199933729. The next prime is 199933757. The reversal of 199933745 is 547339991.

It can be written as a sum of positive squares in 2 ways, for example, as 42406144 + 157527601 = 6512^2 + 12551^2 .

It is not a de Polignac number, because 199933745 - 2⁴ = 199933729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199933693 and 199933702.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164630 + ... + 165839.

It is an arithmetic number, because the mean of its divisors is an integer number (21976255).

Almost surely, 2^199933745 is an apocalyptic number.

It is an amenable number.

199933745 is a deficient number, since it is larger than the sum of its proper divisors (63781315).

199933745 is a wasteful number, since it uses less digits than its factorization.

199933745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330496 (or 330485 counting only the distinct ones).

The product of its digits is 918540, while the sum is 50.

The square root of 199933745 is about 14139.7929617092. The cubic root of 199933745 is about 584.7389635786.

The spelling of 199933745 in words is "one hundred ninety-nine million, nine hundred thirty-three thousand, seven hundred forty-five".