191912045 has 16 divisors (see below), whose sum is σ = 253290240. Its totient is φ = 138702144.

The previous prime is 191912011. The next prime is 191912047. The reversal of 191912045 is 540219191.

191912045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 191912045 - 2¹⁶ = 191846509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191912047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28355 + ... + 34464.

It is an arithmetic number, because the mean of its divisors is an integer number (15830640).

Almost surely, 2^191912045 is an apocalyptic number.

It is an amenable number.

191912045 is a deficient number, since it is larger than the sum of its proper divisors (61378195).

191912045 is a wasteful number, since it uses less digits than its factorization.

191912045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62884.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 191912045 is about 13853.2322943059. The cubic root of 191912045 is about 576.8117222644.

The spelling of 191912045 in words is "one hundred ninety-one million, nine hundred twelve thousand, forty-five".