191794453 has 2 divisors, whose sum is σ = 191794454. Its totient is φ = 191794452.

The previous prime is 191794411. The next prime is 191794469. The reversal of 191794453 is 354497191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186513649 + 5280804 = 13657^2 + 2298^2 .

It is an emirp because it is prime and its reverse (354497191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191794453 - 2²⁵ = 158240021 is a prime.

It is a super-2 number, since 2×191794453² = 73570224403138418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191794483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95897226 + 95897227.

It is an arithmetic number, because the mean of its divisors is an integer number (95897227).

Almost surely, 2^191794453 is an apocalyptic number.

It is an amenable number.

191794453 is a deficient number, since it is larger than the sum of its proper divisors (1).

191794453 is an equidigital number, since it uses as much as digits as its factorization.

191794453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 191794453 is about 13848.9874359103. The cubic root of 191794453 is about 576.6938865089.

It can be divided in two parts, 19179 and 4453, that added together give a palindrome (23632).

The spelling of 191794453 in words is "one hundred ninety-one million, seven hundred ninety-four thousand, four hundred fifty-three".