194042465 has 4 divisors (see below), whose sum is σ = 232850964. Its totient is φ = 155233968.

The previous prime is 194042449. The next prime is 194042483. The reversal of 194042465 is 564240491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 106357969 + 87684496 = 10313^2 + 9364^2 .

It is a cyclic number.

It is not a de Polignac number, because 194042465 - 2⁴ = 194042449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 19404242 + ... + 19404251.

It is an arithmetic number, because the mean of its divisors is an integer number (58212741).

Almost surely, 2^194042465 is an apocalyptic number.

It is an amenable number.

194042465 is a deficient number, since it is larger than the sum of its proper divisors (38808499).

194042465 is an equidigital number, since it uses as much as digits as its factorization.

194042465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38808498.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 194042465 is about 13929.9125984336. The cubic root of 194042465 is about 578.9382726474.

The spelling of 194042465 in words is "one hundred ninety-four million, forty-two thousand, four hundred sixty-five".