3999169 has 4 divisors (see below), whose sum is σ = 4028080. Its totient is φ = 3970260.

The previous prime is 3999161. The next prime is 3999209. The reversal of 3999169 is 9619993.

3999169 = T₁₆₇ + T₁₆₈ + ... + T₃₀₅.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3999169 - 2³ = 3999161 is a prime.

It is a super-2 number, since 2×3999169² = 31986705381122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3999161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14247 + ... + 14524.

It is an arithmetic number, because the mean of its divisors is an integer number (1007020).

Almost surely, 2^3999169 is an apocalyptic number.

It is an amenable number.

3999169 is a deficient number, since it is larger than the sum of its proper divisors (28911).

3999169 is a wasteful number, since it uses less digits than its factorization.

3999169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28910.

The product of its digits is 118098, while the sum is 46.

The square root of 3999169 is about 1999.7922392089. The cubic root of 3999169 is about 158.7291116832.

The spelling of 3999169 in words is "three million, nine hundred ninety-nine thousand, one hundred sixty-nine".