3949531945 has 8 divisors (see below), whose sum is σ = 4739777280. Its totient is φ = 3159399600.

The previous prime is 3949531933. The next prime is 3949532017. The reversal of 3949531945 is 5491359493.

3949531945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3949531945 - 2²⁹ = 3412661033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3949531892 and 3949531901.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111670 + ... + 142720.

It is an arithmetic number, because the mean of its divisors is an integer number (592472160).

Almost surely, 2^3949531945 is an apocalyptic number.

It is an amenable number.

3949531945 is a deficient number, since it is larger than the sum of its proper divisors (790245335).

3949531945 is a wasteful number, since it uses less digits than its factorization.

3949531945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56495.

The product of its digits is 2624400, while the sum is 52.

The square root of 3949531945 is about 62845.3016939214. The cubic root of 3949531945 is about 1580.6966890964.

The spelling of 3949531945 in words is "three billion, nine hundred forty-nine million, five hundred thirty-one thousand, nine hundred forty-five".