3999422169 has 16 divisors (see below), whose sum is σ = 5928520000. Its totient is φ = 2664728928.

The previous prime is 3999422149. The next prime is 3999422171. The reversal of 3999422169 is 9612249993.

3999422169 is a `hidden beast` number, since 399 + 94 + 2 + 2 + 169 = 666.

It is not a de Polignac number, because 3999422169 - 2⁷ = 3999422041 is a prime.

It is a super-2 number, since 2×3999422169² = 31990755371777329122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3999422129) 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, 5082 + ... + 89580.

It is an arithmetic number, because the mean of its divisors is an integer number (370532500).

Almost surely, 2^3999422169 is an apocalyptic number.

It is an amenable number.

3999422169 is a deficient number, since it is larger than the sum of its proper divisors (1929097831).

3999422169 is a wasteful number, since it uses less digits than its factorization.

3999422169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86261 (or 86255 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 3999422169 is about 63240.9848832227. The cubic root of 3999422169 is about 1587.3246108258.

The spelling of 3999422169 in words is "three billion, nine hundred ninety-nine million, four hundred twenty-two thousand, one hundred sixty-nine".