3894939669 has 8 divisors (see below), whose sum is σ = 5419046592. Its totient is φ = 2483729600.

The previous prime is 3894939647. The next prime is 3894939691. The reversal of 3894939669 is 9669394983.

It is an interprime number because it is at equal distance from previous prime (3894939647) and next prime (3894939691).

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 3894939669 - 2²⁹ = 3358068757 is a prime.

It is a super-2 number, since 2×3894939669² = 30341110050299659122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3894939869) 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, 28224132 + ... + 28224269.

It is an arithmetic number, because the mean of its divisors is an integer number (677380824).

Almost surely, 2^3894939669 is an apocalyptic number.

It is an amenable number.

3894939669 is a deficient number, since it is larger than the sum of its proper divisors (1524106923).

3894939669 is a wasteful number, since it uses less digits than its factorization.

3894939669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56448427.

The product of its digits is 68024448, while the sum is 66.

The square root of 3894939669 is about 62409.4517601301. The cubic root of 3894939669 is about 1573.3798297279.

The spelling of 3894939669 in words is "three billion, eight hundred ninety-four million, nine hundred thirty-nine thousand, six hundred sixty-nine".