194879491 has 4 divisors (see below), whose sum is σ = 197346400. Its totient is φ = 192412584.

The previous prime is 194879479. The next prime is 194879497. The reversal of 194879491 is 194978491.

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 194879491 - 2²³ = 186490883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194879497) 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, 1233336 + ... + 1233493.

It is an arithmetic number, because the mean of its divisors is an integer number (49336600).

Almost surely, 2^194879491 is an apocalyptic number.

194879491 is a deficient number, since it is larger than the sum of its proper divisors (2466909).

194879491 is an equidigital number, since it uses as much as digits as its factorization.

194879491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466908.

The product of its digits is 653184, while the sum is 52.

The square root of 194879491 is about 13959.9244625464. The cubic root of 194879491 is about 579.7695190060.

The spelling of 194879491 in words is "one hundred ninety-four million, eight hundred seventy-nine thousand, four hundred ninety-one".