4021969399 has 8 divisors (see below), whose sum is σ = 4694335488. Its totient is φ = 3374053080.

The previous prime is 4021969349. The next prime is 4021969403. The reversal of 4021969399 is 9939691204.

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 4021969399 - 2¹⁵ = 4021936631 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 (4021969349) 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, 6112087 + ... + 6112744.

It is an arithmetic number, because the mean of its divisors is an integer number (586791936).

Almost surely, 2^4021969399 is an apocalyptic number.

4021969399 is a deficient number, since it is larger than the sum of its proper divisors (672366089).

4021969399 is a wasteful number, since it uses less digits than its factorization.

4021969399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224885.

The product of its (nonzero) digits is 944784, while the sum is 52.

The square root of 4021969399 is about 63418.9987227802. The cubic root of 4021969399 is about 1590.3019348018.

The spelling of 4021969399 in words is "four billion, twenty-one million, nine hundred sixty-nine thousand, three hundred ninety-nine".