199932645 has 32 divisors (see below), whose sum is σ = 358416000. Its totient is φ = 94314240.

The previous prime is 199932643. The next prime is 199932659. The reversal of 199932645 is 546239991.

It is not a de Polignac number, because 199932645 - 2¹ = 199932643 is a prime.

Its product of digits (524880) is a multiple of the sum of its prime divisors (32805).

It is a junction number, because it is equal to n+sod(n) for n = 199932594 and 199932603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199932643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10270 + ... + 22479.

It is an arithmetic number, because the mean of its divisors is an integer number (11200500).

Almost surely, 2^199932645 is an apocalyptic number.

199932645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199932645 is a deficient number, since it is larger than the sum of its proper divisors (158483355).

199932645 is a wasteful number, since it uses less digits than its factorization.

199932645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32805.

The product of its digits is 524880, while the sum is 48.

The square root of 199932645 is about 14139.7540643393. The cubic root of 199932645 is about 584.7378912000.

The spelling of 199932645 in words is "one hundred ninety-nine million, nine hundred thirty-two thousand, six hundred forty-five".