1990199 has 8 divisors (see below), whose sum is σ = 2042400. Its totient is φ = 1938816.

The previous prime is 1990189. The next prime is 1990211. The reversal of 1990199 is 9910991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1990199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9902 + ... + 10100.

It is an arithmetic number, because the mean of its divisors is an integer number (255300).

2^1990199 is an apocalyptic number.

1990199 is a deficient number, since it is larger than the sum of its proper divisors (52201).

1990199 is a wasteful number, since it uses less digits than its factorization.

1990199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409.

The product of its (nonzero) digits is 6561, while the sum is 38.

The square root of 1990199 is about 1410.7441298832. The cubic root of 1990199 is about 125.7859597802.

The spelling of 1990199 in words is "one million, nine hundred ninety thousand, one hundred ninety-nine".