191711012 has 12 divisors (see below), whose sum is σ = 335600496. Its totient is φ = 95825160.

The previous prime is 191710997. The next prime is 191711041. The reversal of 191711012 is 210117191.

It is a happy number.

191711012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×191711012² = 73506224244128288, which contains 22 as substring.

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, 12587 + ... + 23277.

It is an arithmetic number, because the mean of its divisors is an integer number (27966708).

Almost surely, 2^191711012 is an apocalyptic number.

It is an amenable number.

191711012 is a deficient number, since it is larger than the sum of its proper divisors (143889484).

191711012 is a wasteful number, since it uses less digits than its factorization.

191711012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15178 (or 15176 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 23.

The square root of 191711012 is about 13845.9745774720. The cubic root of 191711012 is about 576.6102433277.

The spelling of 191711012 in words is "one hundred ninety-one million, seven hundred eleven thousand, twelve".