200991930 has 32 divisors (see below), whose sum is σ = 483050304. Its totient is φ = 53523456.

The previous prime is 200991913. The next prime is 200991949. The reversal of 200991930 is 39199002.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200991891 and 200991900.

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, 19354 + ... + 27866.

It is an arithmetic number, because the mean of its divisors is an integer number (15095322).

Almost surely, 2^200991930 is an apocalyptic number.

200991930 is an abundant number, since it is smaller than the sum of its proper divisors (282058374).

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

200991930 is a wasteful number, since it uses less digits than its factorization.

200991930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9310.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 200991930 is about 14177.1622689451. The cubic root of 200991930 is about 585.7687606624.

It can be divided in two parts, 2009 and 91930, that added together give a palindrome (93939).

The spelling of 200991930 in words is "two hundred million, nine hundred ninety-one thousand, nine hundred thirty".