191803973453 has 2 divisors, whose sum is σ = 191803973454. Its totient is φ = 191803973452.

The previous prime is 191803973437. The next prime is 191803973461. The reversal of 191803973453 is 354379308191.

191803973453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191793195364 + 10778089 = 437942^2 + 3283^2 .

It is a cyclic number.

It is not a de Polignac number, because 191803973453 - 2⁴ = 191803973437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191803973395 and 191803973404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191803973653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95901986726 + 95901986727.

It is an arithmetic number, because the mean of its divisors is an integer number (95901986727).

Almost surely, 2^191803973453 is an apocalyptic number.

It is an amenable number.

191803973453 is a deficient number, since it is larger than the sum of its proper divisors (1).

191803973453 is an equidigital number, since it uses as much as digits as its factorization.

191803973453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 191803973453 in words is "one hundred ninety-one billion, eight hundred three million, nine hundred seventy-three thousand, four hundred fifty-three".