191213494 has 8 divisors (see below), whose sum is σ = 289501128. Its totient is φ = 94713120.

The previous prime is 191213483. The next prime is 191213509. The reversal of 191213494 is 494312191.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446547 + ... + 446974.

It is an arithmetic number, because the mean of its divisors is an integer number (36187641).

Almost surely, 2^191213494 is an apocalyptic number.

191213494 is a deficient number, since it is larger than the sum of its proper divisors (98287634).

191213494 is a wasteful number, since it uses less digits than its factorization.

191213494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893630.

The product of its digits is 7776, while the sum is 34.

The square root of 191213494 is about 13827.9967457329. The cubic root of 191213494 is about 576.1110153658. Note that the first 3 decimals are identical.

The spelling of 191213494 in words is "one hundred ninety-one million, two hundred thirteen thousand, four hundred ninety-four".