195279973 has 16 divisors (see below), whose sum is σ = 226506240. Its totient is φ = 164900736.

The previous prime is 195279961. The next prime is 195279977. The reversal of 195279973 is 379972591.

It is not a de Polignac number, because 195279973 - 2⁵ = 195279941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195279973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195279977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288111 + ... + 288787.

It is an arithmetic number, because the mean of its divisors is an integer number (14156640).

Almost surely, 2^195279973 is an apocalyptic number.

It is an amenable number.

195279973 is a deficient number, since it is larger than the sum of its proper divisors (31226267).

195279973 is an equidigital number, since it uses as much as digits as its factorization.

195279973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its digits is 1071630, while the sum is 52.

The square root of 195279973 is about 13974.2610895890. The cubic root of 195279973 is about 580.1663939953.

The spelling of 195279973 in words is "one hundred ninety-five million, two hundred seventy-nine thousand, nine hundred seventy-three".