195406511 has 2 divisors, whose sum is σ = 195406512. Its totient is φ = 195406510.

The previous prime is 195406499. The next prime is 195406529. The reversal of 195406511 is 115604591.

It is a weak prime.

It is an emirp because it is prime and its reverse (115604591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195406511 - 2¹⁴ = 195390127 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195406571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97703255 + 97703256.

It is an arithmetic number, because the mean of its divisors is an integer number (97703256).

Almost surely, 2^195406511 is an apocalyptic number.

195406511 is a deficient number, since it is larger than the sum of its proper divisors (1).

195406511 is an equidigital number, since it uses as much as digits as its factorization.

195406511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 195406511 is about 13978.7878945208. The cubic root of 195406511 is about 580.2916794900.

The spelling of 195406511 in words is "one hundred ninety-five million, four hundred six thousand, five hundred eleven".