991200190 has 8 divisors (see below), whose sum is σ = 1784160360. Its totient is φ = 396480072.

The previous prime is 991200187. The next prime is 991200233. The reversal of 991200190 is 91002199.

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

It is a super-2 number, since 2×991200190² = 1964955633312072200, 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, 49560000 + ... + 49560019.

It is an arithmetic number, because the mean of its divisors is an integer number (223020045).

Almost surely, 2^991200190 is an apocalyptic number.

991200190 is a deficient number, since it is larger than the sum of its proper divisors (792960170).

991200190 is a wasteful number, since it uses less digits than its factorization.

991200190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99120026.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 991200190 is about 31483.3319392977. The cubic root of 991200190 is about 997.0580836153.

The spelling of 991200190 in words is "nine hundred ninety-one million, two hundred thousand, one hundred ninety".