195315047 has 2 divisors, whose sum is σ = 195315048. Its totient is φ = 195315046.

The previous prime is 195315037. The next prime is 195315049. The reversal of 195315047 is 740513591.

195315047 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 is a cyclic number.

It is not a de Polignac number, because 195315047 - 2⁴ = 195315031 is a prime.

It is a super-2 number, since 2×195315047² = 76295935169224418, which contains 22 as substring.

Together with 195315049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 195314998 and 195315016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195315049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97657523 + 97657524.

It is an arithmetic number, because the mean of its divisors is an integer number (97657524).

Almost surely, 2^195315047 is an apocalyptic number.

195315047 is a deficient number, since it is larger than the sum of its proper divisors (1).

195315047 is an equidigital number, since it uses as much as digits as its factorization.

195315047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 195315047 is about 13975.5159833188. The cubic root of 195315047 is about 580.2011262443.

The spelling of 195315047 in words is "one hundred ninety-five million, three hundred fifteen thousand, forty-seven".