3945293989 has 64 divisors (see below), whose sum is σ = 5313724416. Its totient is φ = 2840914944.

The previous prime is 3945293987. The next prime is 3945294037. The reversal of 3945293989 is 9893925493.

It is not a de Polignac number, because 3945293989 - 2¹ = 3945293987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945293987) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8447934 + ... + 8448400.

It is an arithmetic number, because the mean of its divisors is an integer number (83026944).

Almost surely, 2^3945293989 is an apocalyptic number.

It is an amenable number.

3945293989 is a deficient number, since it is larger than the sum of its proper divisors (1368430427).

3945293989 is a wasteful number, since it uses less digits than its factorization.

3945293989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674.

The product of its digits is 18895680, while the sum is 61.

The square root of 3945293989 is about 62811.5752787653. The cubic root of 3945293989 is about 1580.1311098005.

The spelling of 3945293989 in words is "three billion, nine hundred forty-five million, two hundred ninety-three thousand, nine hundred eighty-nine".