191649213 has 32 divisors (see below), whose sum is σ = 325201920. Its totient is φ = 109272240.

The previous prime is 191649203. The next prime is 191649229. The reversal of 191649213 is 312946191.

It is a happy number.

191649213 is a `hidden beast` number, since 1 + 9 + 1 + 649 + 2 + 1 + 3 = 666.

It is not a de Polignac number, because 191649213 - 2²⁴ = 174871997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191649203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118456 + ... + 120062.

It is an arithmetic number, because the mean of its divisors is an integer number (10162560).

Almost surely, 2^191649213 is an apocalyptic number.

It is an amenable number.

191649213 is a deficient number, since it is larger than the sum of its proper divisors (133552707).

191649213 is a wasteful number, since it uses less digits than its factorization.

191649213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254 (or 2248 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 191649213 is about 13843.7427381471. The cubic root of 191649213 is about 576.5482789407.

The spelling of 191649213 in words is "one hundred ninety-one million, six hundred forty-nine thousand, two hundred thirteen".