3999349 has 4 divisors (see below), whose sum is σ = 4020480. Its totient is φ = 3978220.

The previous prime is 3999337. The next prime is 3999379. The reversal of 3999349 is 9439993.

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 an emirpimes, since its reverse is a distinct semiprime: 9439993 = 29 ⋅325517.

It is a cyclic number.

It is not a de Polignac number, because 3999349 - 2⁹ = 3998837 is a prime.

It is a Duffinian number.

3999349 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3999299 and 3999308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999379) 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, 10279 + ... + 10660.

It is an arithmetic number, because the mean of its divisors is an integer number (1005120).

Almost surely, 2^3999349 is an apocalyptic number.

It is an amenable number.

3999349 is a deficient number, since it is larger than the sum of its proper divisors (21131).

3999349 is a wasteful number, since it uses less digits than its factorization.

3999349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21130.

The product of its digits is 236196, while the sum is 46.

The square root of 3999349 is about 1999.8372433776. The cubic root of 3999349 is about 158.7314930789.

The spelling of 3999349 in words is "three million, nine hundred ninety-nine thousand, three hundred forty-nine".