194679457 has 4 divisors (see below), whose sum is σ = 222490816. Its totient is φ = 166868100.

The previous prime is 194679449. The next prime is 194679467. The reversal of 194679457 is 754976491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 754976491 = 14149 ⋅53359.

It is not a de Polignac number, because 194679457 - 2³ = 194679449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194679467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13905669 + ... + 13905682.

It is an arithmetic number, because the mean of its divisors is an integer number (55622704).

Almost surely, 2^194679457 is an apocalyptic number.

It is an amenable number.

194679457 is a deficient number, since it is larger than the sum of its proper divisors (27811359).

194679457 is an equidigital number, since it uses as much as digits as its factorization.

194679457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27811358.

The product of its digits is 1905120, while the sum is 52.

The square root of 194679457 is about 13952.7580427670. The cubic root of 194679457 is about 579.5710830078.

The spelling of 194679457 in words is "one hundred ninety-four million, six hundred seventy-nine thousand, four hundred fifty-seven".