191045694 has 64 divisors (see below), whose sum is σ = 472283136. Its totient is φ = 50271744.

The previous prime is 191045693. The next prime is 191045713. The reversal of 191045694 is 496540191.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191045693) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 30712 + ... + 36404.

It is an arithmetic number, because the mean of its divisors is an integer number (7379424).

Almost surely, 2^191045694 is an apocalyptic number.

191045694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 191045694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236141568).

191045694 is an abundant number, since it is smaller than the sum of its proper divisors (281237442).

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

191045694 is a wasteful number, since it uses less digits than its factorization.

191045694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5769.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 191045694 is about 13821.9280131247. The cubic root of 191045694 is about 575.9424433712.

The spelling of 191045694 in words is "one hundred ninety-one million, forty-five thousand, six hundred ninety-four".