3194923945 has 4 divisors (see below), whose sum is σ = 3833908740. Its totient is φ = 2555939152.

The previous prime is 3194923943. The next prime is 3194923973. The reversal of 3194923945 is 5493294913.

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 1266221056 + 1928702889 = 35584^2 + 43917^2 .

It is a cyclic number.

It is not a de Polignac number, because 3194923945 - 2¹ = 3194923943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3194923943) 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, 319492390 + ... + 319492399.

It is an arithmetic number, because the mean of its divisors is an integer number (958477185).

Almost surely, 2^3194923945 is an apocalyptic number.

It is an amenable number.

3194923945 is a deficient number, since it is larger than the sum of its proper divisors (638984795).

3194923945 is an equidigital number, since it uses as much as digits as its factorization.

3194923945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638984794.

The product of its digits is 1049760, while the sum is 49.

The square root of 3194923945 is about 56523.6582768667. The cubic root of 3194923945 is about 1472.8330059917.

The spelling of 3194923945 in words is "three billion, one hundred ninety-four million, nine hundred twenty-three thousand, nine hundred forty-five".