1954319305 has 4 divisors (see below), whose sum is σ = 2345183172. Its totient is φ = 1563455440.

The previous prime is 1954319299. The next prime is 1954319333. The reversal of 1954319305 is 5039134591.

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 1417748409 + 536570896 = 37653^2 + 23164^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1954319305 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195431926 + ... + 195431935.

It is an arithmetic number, because the mean of its divisors is an integer number (586295793).

Almost surely, 2^1954319305 is an apocalyptic number.

It is an amenable number.

1954319305 is a deficient number, since it is larger than the sum of its proper divisors (390863867).

1954319305 is an equidigital number, since it uses as much as digits as its factorization.

1954319305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390863866.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 1954319305 is about 44207.6837778231. The cubic root of 1954319305 is about 1250.2547331520.

The spelling of 1954319305 in words is "one billion, nine hundred fifty-four million, three hundred nineteen thousand, three hundred five".