194520979 has 4 divisors (see below), whose sum is σ = 194572984. Its totient is φ = 194468976.

The previous prime is 194520941. The next prime is 194521007. The reversal of 194520979 is 979025491.

It is a happy number.

194520979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 194520979 - 2⁹ = 194520467 is a prime.

It is a super-2 number, since 2×194520979² = 75676822542236882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194520779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19917 + ... + 28030.

It is an arithmetic number, because the mean of its divisors is an integer number (48643246).

Almost surely, 2^194520979 is an apocalyptic number.

194520979 is a deficient number, since it is larger than the sum of its proper divisors (52005).

194520979 is an equidigital number, since it uses as much as digits as its factorization.

194520979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52004.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 194520979 is about 13947.0777942908. The cubic root of 194520979 is about 579.4137745070.

The spelling of 194520979 in words is "one hundred ninety-four million, five hundred twenty thousand, nine hundred seventy-nine".