191009432 has 48 divisors (see below), whose sum is σ = 384552600. Its totient is φ = 88944624.

The previous prime is 191009417. The next prime is 191009443. The reversal of 191009432 is 234900191.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

191009432 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×191009432² = 72969206225925248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 191009395 and 191009404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3237419 + ... + 3237477.

Almost surely, 2^191009432 is an apocalyptic number.

It is an amenable number.

191009432 is an abundant number, since it is smaller than the sum of its proper divisors (193543168).

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

191009432 is an frugal number, since it uses more digits than its factorization.

191009432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 191009432 is about 13820.6161946564. The cubic root of 191009432 is about 575.9060015721.

The spelling of 191009432 in words is "one hundred ninety-one million, nine thousand, four hundred thirty-two".