3999269 has 4 divisors (see below), whose sum is σ = 4003296. Its totient is φ = 3995244.

The previous prime is 3999251. The next prime is 3999283. The reversal of 3999269 is 9629993.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3999269 - 2¹⁶ = 3933733 is a prime.

It is a super-2 number, since 2×3999269² = 31988305068722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999209) 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, 662 + ... + 2904.

It is an arithmetic number, because the mean of its divisors is an integer number (1000824).

Almost surely, 2^3999269 is an apocalyptic number.

It is an amenable number.

3999269 is a deficient number, since it is larger than the sum of its proper divisors (4027).

3999269 is a wasteful number, since it uses less digits than its factorization.

3999269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026.

The product of its digits is 236196, while the sum is 47.

The square root of 3999269 is about 1999.8172416498. The cubic root of 3999269 is about 158.7304346896.

The spelling of 3999269 in words is "three million, nine hundred ninety-nine thousand, two hundred sixty-nine".