191164426 has 8 divisors (see below), whose sum is σ = 286838244. Its totient is φ = 95551680.

The previous prime is 191164411. The next prime is 191164429. The reversal of 191164426 is 624461191.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 171583801 + 19580625 = 13099^2 + 4425^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 191164391 and 191164400.

It is not an unprimeable number, because it can be changed into a prime (191164429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6415 + ... + 20578.

Almost surely, 2^191164426 is an apocalyptic number.

191164426 is a deficient number, since it is larger than the sum of its proper divisors (95673818).

191164426 is a wasteful number, since it uses less digits than its factorization.

191164426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30536.

The product of its digits is 10368, while the sum is 34.

The square root of 191164426 is about 13826.2224052704. Note that the first 3 decimals coincide. The cubic root of 191164426 is about 576.0617318258.

The spelling of 191164426 in words is "one hundred ninety-one million, one hundred sixty-four thousand, four hundred twenty-six".