1954394305 has 4 divisors (see below), whose sum is σ = 2345273172. Its totient is φ = 1563515440.

The previous prime is 1954394297. The next prime is 1954394329. The reversal of 1954394305 is 5034934591.

It is a happy number.

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 676832256 + 1277562049 = 26016^2 + 35743^2 .

It is not a de Polignac number, because 1954394305 - 2³ = 1954394297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195439426 + ... + 195439435.

It is an arithmetic number, because the mean of its divisors is an integer number (586318293).

Almost surely, 2^1954394305 is an apocalyptic number.

It is an amenable number.

1954394305 is a deficient number, since it is larger than the sum of its proper divisors (390878867).

1954394305 is an equidigital number, since it uses as much as digits as its factorization.

1954394305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390878866.

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 1954394305 is about 44208.5320385104. The cubic root of 1954394305 is about 1250.2707264282.

The spelling of 1954394305 in words is "one billion, nine hundred fifty-four million, three hundred ninety-four thousand, three hundred five".