199661046 has 32 divisors (see below), whose sum is σ = 431638368. Its totient is φ = 61205760.

The previous prime is 199661023. The next prime is 199661051. The reversal of 199661046 is 640166991.

It is a junction number, because it is equal to n+sod(n) for n = 199660989 and 199661007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16986 + ... + 26226.

It is an arithmetic number, because the mean of its divisors is an integer number (13488699).

Almost surely, 2^199661046 is an apocalyptic number.

199661046 is an abundant number, since it is smaller than the sum of its proper divisors (231977322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199661046 is a wasteful number, since it uses less digits than its factorization.

199661046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9536.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 199661046 is about 14130.1467083679. The cubic root of 199661046 is about 584.4729916639.

It can be divided in two parts, 19966 and 1046, that added together give a palindrome (21012).

The spelling of 199661046 in words is "one hundred ninety-nine million, six hundred sixty-one thousand, forty-six".