191948621 has 8 divisors (see below), whose sum is σ = 208569600. Its totient is φ = 175979520.

The previous prime is 191948597. The next prime is 191948629. The reversal of 191948621 is 126849191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 191948621 - 2⁶ = 191948557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191948629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162356 + ... + 163533.

It is an arithmetic number, because the mean of its divisors is an integer number (26071200).

Almost surely, 2^191948621 is an apocalyptic number.

It is an amenable number.

191948621 is a deficient number, since it is larger than the sum of its proper divisors (16620979).

191948621 is a wasteful number, since it uses less digits than its factorization.

191948621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325939.

The product of its digits is 31104, while the sum is 41.

The square root of 191948621 is about 13854.5523565361. The cubic root of 191948621 is about 576.8483642678.

The spelling of 191948621 in words is "one hundred ninety-one million, nine hundred forty-eight thousand, six hundred twenty-one".