191324473 has 4 divisors (see below), whose sum is σ = 192721140. Its totient is φ = 189927808.

The previous prime is 191324431. The next prime is 191324489. The reversal of 191324473 is 374423191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 374423191 = 11057 ⋅33863.

It can be written as a sum of positive squares in 2 ways, for example, as 116899344 + 74425129 = 10812^2 + 8627^2 .

It is a cyclic number.

It is not a de Polignac number, because 191324473 - 2²¹ = 189227321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191324423) 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, 698128 + ... + 698401.

It is an arithmetic number, because the mean of its divisors is an integer number (48180285).

Almost surely, 2^191324473 is an apocalyptic number.

It is an amenable number.

191324473 is a deficient number, since it is larger than the sum of its proper divisors (1396667).

191324473 is a wasteful number, since it uses less digits than its factorization.

191324473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396666.

The product of its digits is 18144, while the sum is 34.

The square root of 191324473 is about 13832.0090008646. The cubic root of 191324473 is about 576.2224507700. Note that the first 3 decimals are identical.

The spelling of 191324473 in words is "one hundred ninety-one million, three hundred twenty-four thousand, four hundred seventy-three".