191071912 has 8 divisors (see below), whose sum is σ = 358259850. Its totient is φ = 95535952.

The previous prime is 191071897. The next prime is 191071949. The reversal of 191071912 is 219170191.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 178863876 + 12208036 = 13374^2 + 3494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11941987 + ... + 11942002.

Almost surely, 2^191071912 is an apocalyptic number.

It is an amenable number.

191071912 is a deficient number, since it is larger than the sum of its proper divisors (167187938).

191071912 is a wasteful number, since it uses less digits than its factorization.

191071912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23883995 (or 23883991 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 31.

The square root of 191071912 is about 13822.8764010968. The cubic root of 191071912 is about 575.9687884965.

The spelling of 191071912 in words is "one hundred ninety-one million, seventy-one thousand, nine hundred twelve".