191691016 has 32 divisors (see below), whose sum is σ = 409147200. Its totient is φ = 83343040.

The previous prime is 191691007. The next prime is 191691029. The reversal of 191691016 is 610196191.

191691016 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×191691016² = 73490891230224512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45331 + ... + 49378.

It is an arithmetic number, because the mean of its divisors is an integer number (12785850).

Almost surely, 2^191691016 is an apocalyptic number.

It is an amenable number.

191691016 is an abundant number, since it is smaller than the sum of its proper divisors (217456184).

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

191691016 is a wasteful number, since it uses less digits than its factorization.

191691016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94749 (or 94745 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 191691016 is about 13845.2524715153. The cubic root of 191691016 is about 576.5901952717.

The spelling of 191691016 in words is "one hundred ninety-one million, six hundred ninety-one thousand, sixteen".