3945939757 has 8 divisors (see below), whose sum is σ = 4030793600. Its totient is φ = 3861736560.

The previous prime is 3945939617. The next prime is 3945939761. The reversal of 3945939757 is 7579395493.

3945939757 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 a cyclic number.

It is not a de Polignac number, because 3945939757 - 2¹⁵ = 3945906989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3945939695 and 3945939704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945939857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150393 + ... + 174670.

It is an arithmetic number, because the mean of its divisors is an integer number (503849200).

Almost surely, 2^3945939757 is an apocalyptic number.

It is an amenable number.

3945939757 is a deficient number, since it is larger than the sum of its proper divisors (84853843).

3945939757 is a wasteful number, since it uses less digits than its factorization.

3945939757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325323.

The product of its digits is 32148900, while the sum is 61.

The square root of 3945939757 is about 62816.7155859012. The cubic root of 3945939757 is about 1580.2173173549.

The spelling of 3945939757 in words is "three billion, nine hundred forty-five million, nine hundred thirty-nine thousand, seven hundred fifty-seven".