199391630 has 8 divisors (see below), whose sum is σ = 358904952. Its totient is φ = 79756648.

The previous prime is 199391593. The next prime is 199391641. The reversal of 199391630 is 36193991.

199391630 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×199391630² = 79514044228113800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9969572 + ... + 9969591.

It is an arithmetic number, because the mean of its divisors is an integer number (44863119).

Almost surely, 2^199391630 is an apocalyptic number.

199391630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199391630 is a deficient number, since it is larger than the sum of its proper divisors (159513322).

199391630 is a wasteful number, since it uses less digits than its factorization.

199391630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19939170.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 199391630 is about 14120.6101142975. The cubic root of 199391630 is about 584.2099838340.

The spelling of 199391630 in words is "one hundred ninety-nine million, three hundred ninety-one thousand, six hundred thirty".