195129133 has 2 divisors, whose sum is σ = 195129134. Its totient is φ = 195129132.

The previous prime is 195129061. The next prime is 195129149. The reversal of 195129133 is 331921591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183819364 + 11309769 = 13558^2 + 3363^2 .

It is a cyclic number.

It is not a de Polignac number, because 195129133 - 2⁹ = 195128621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195129433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97564566 + 97564567.

It is an arithmetic number, because the mean of its divisors is an integer number (97564567).

Almost surely, 2^195129133 is an apocalyptic number.

It is an amenable number.

195129133 is a deficient number, since it is larger than the sum of its proper divisors (1).

195129133 is an equidigital number, since it uses as much as digits as its factorization.

195129133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 34.

The square root of 195129133 is about 13968.8629816460. The cubic root of 195129133 is about 580.0169763164.

The spelling of 195129133 in words is "one hundred ninety-five million, one hundred twenty-nine thousand, one hundred thirty-three".