195290919 has 10 divisors (see below), whose sum is σ = 291731000. Its totient is φ = 130193892.

The previous prime is 195290899. The next prime is 195290933. The reversal of 195290919 is 919092591.

It is not a de Polignac number, because 195290919 - 2¹² = 195286823 is a prime.

It is a super-3 number, since 3×195290919³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195290519) 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 in 9 ways as a sum of consecutive naturals, for example, 1205419 + ... + 1205580.

It is an arithmetic number, because the mean of its divisors is an integer number (29173100).

Almost surely, 2^195290919 is an apocalyptic number.

195290919 is a deficient number, since it is larger than the sum of its proper divisors (96440081).

195290919 is an equidigital number, since it uses as much as digits as its factorization.

195290919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411011 (or 2411002 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 45.

The square root of 195290919 is about 13974.6527327158. The cubic root of 195290919 is about 580.1772337870.

Adding to 195290919 its product of nonzero digits (65610), we get a square (195356529 = 13977²).

The spelling of 195290919 in words is "one hundred ninety-five million, two hundred ninety thousand, nine hundred nineteen".