3947779429 has 16 divisors (see below), whose sum is σ = 4443699456. Its totient is φ = 3476275200.

The previous prime is 3947779403. The next prime is 3947779441. The reversal of 3947779429 is 9249777493.

It is a cyclic number.

It is not a de Polignac number, because 3947779429 - 2¹¹ = 3947777381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947779499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10789 + ... + 89509.

It is an arithmetic number, because the mean of its divisors is an integer number (277731216).

Almost surely, 2^3947779429 is an apocalyptic number.

It is an amenable number.

3947779429 is a deficient number, since it is larger than the sum of its proper divisors (495920027).

3947779429 is a wasteful number, since it uses less digits than its factorization.

3947779429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78876.

The product of its digits is 24004512, while the sum is 61.

The square root of 3947779429 is about 62831.3570520325. The cubic root of 3947779429 is about 1580.4628549683.

The spelling of 3947779429 in words is "three billion, nine hundred forty-seven million, seven hundred seventy-nine thousand, four hundred twenty-nine".