191427541 has 2 divisors, whose sum is σ = 191427542. Its totient is φ = 191427540.

The previous prime is 191427517. The next prime is 191427553. The reversal of 191427541 is 145724191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147258225 + 44169316 = 12135^2 + 6646^2 .

It is an emirp because it is prime and its reverse (145724191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191427541 - 2⁹ = 191427029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191427497 and 191427506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191427581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95713770 + 95713771.

It is an arithmetic number, because the mean of its divisors is an integer number (95713771).

Almost surely, 2^191427541 is an apocalyptic number.

It is an amenable number.

191427541 is a deficient number, since it is larger than the sum of its proper divisors (1).

191427541 is an equidigital number, since it uses as much as digits as its factorization.

191427541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 191427541 is about 13835.7342053105. The cubic root of 191427541 is about 576.3259040523.

The spelling of 191427541 in words is "one hundred ninety-one million, four hundred twenty-seven thousand, five hundred forty-one".