199932643 has 2 divisors, whose sum is σ = 199932644. Its totient is φ = 199932642.

The previous prime is 199932613. The next prime is 199932659. The reversal of 199932643 is 346239991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199932643 - 2¹³ = 199924451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199932593 and 199932602.

It is not a weakly prime, because it can be changed into another prime (199932613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99966321 + 99966322.

It is an arithmetic number, because the mean of its divisors is an integer number (99966322).

Almost surely, 2^199932643 is an apocalyptic number.

199932643 is a deficient number, since it is larger than the sum of its proper divisors (1).

199932643 is an equidigital number, since it uses as much as digits as its factorization.

199932643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 46.

The square root of 199932643 is about 14139.7539936167. The cubic root of 199932643 is about 584.7378892502.

The spelling of 199932643 in words is "one hundred ninety-nine million, nine hundred thirty-two thousand, six hundred forty-three".