191502133 has 2 divisors, whose sum is σ = 191502134. Its totient is φ = 191502132.

The previous prime is 191502067. The next prime is 191502149. The reversal of 191502133 is 331205191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125843524 + 65658609 = 11218^2 + 8103^2 .

It is an emirp because it is prime and its reverse (331205191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191502133 - 2⁹ = 191501621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191502098 and 191502107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191502173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95751066 + 95751067.

It is an arithmetic number, because the mean of its divisors is an integer number (95751067).

Almost surely, 2^191502133 is an apocalyptic number.

It is an amenable number.

191502133 is a deficient number, since it is larger than the sum of its proper divisors (1).

191502133 is an equidigital number, since it uses as much as digits as its factorization.

191502133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 191502133 is about 13838.4295713061. The cubic root of 191502133 is about 576.4007517275.

The spelling of 191502133 in words is "one hundred ninety-one million, five hundred two thousand, one hundred thirty-three".