195129001 has 2 divisors, whose sum is σ = 195129002. Its totient is φ = 195129000.

The previous prime is 195128977. The next prime is 195129017. The reversal of 195129001 is 100921591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170328601 + 24800400 = 13051^2 + 4980^2 .

It is an emirp because it is prime and its reverse (100921591) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195129001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195129061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97564500 + 97564501.

It is an arithmetic number, because the mean of its divisors is an integer number (97564501).

Almost surely, 2^195129001 is an apocalyptic number.

It is an amenable number.

195129001 is a deficient number, since it is larger than the sum of its proper divisors (1).

195129001 is an equidigital number, since it uses as much as digits as its factorization.

195129001 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 28.

The square root of 195129001 is about 13968.8582568512. The cubic root of 195129001 is about 580.0168455274.

The spelling of 195129001 in words is "one hundred ninety-five million, one hundred twenty-nine thousand, one".