199750387 has 2 divisors, whose sum is σ = 199750388. Its totient is φ = 199750386.

The previous prime is 199750379. The next prime is 199750403. The reversal of 199750387 is 783057991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199750387 - 2³ = 199750379 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199750387.

It is not a weakly prime, because it can be changed into another prime (199750337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99875193 + 99875194.

It is an arithmetic number, because the mean of its divisors is an integer number (99875194).

Almost surely, 2^199750387 is an apocalyptic number.

199750387 is a deficient number, since it is larger than the sum of its proper divisors (1).

199750387 is an equidigital number, since it uses as much as digits as its factorization.

199750387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 199750387 is about 14133.3077161718. The cubic root of 199750387 is about 584.5601554115.

The spelling of 199750387 in words is "one hundred ninety-nine million, seven hundred fifty thousand, three hundred eighty-seven".