3900049 has 4 divisors (see below), whose sum is σ = 3904000. Its totient is φ = 3896100.

The previous prime is 3899989. The next prime is 3900067. The reversal of 3900049 is 9400093.

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 3900049 - 2¹¹ = 3898001 is a prime.

It is a Duffinian number.

3900049 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3899996 and 3900032.

It is not an unprimeable number, because it can be changed into a prime (3900349) 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, 952 + ... + 2950.

It is an arithmetic number, because the mean of its divisors is an integer number (976000).

Almost surely, 2^3900049 is an apocalyptic number.

It is an amenable number.

3900049 is a deficient number, since it is larger than the sum of its proper divisors (3951).

3900049 is a wasteful number, since it uses less digits than its factorization.

3900049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 3900049 is about 1974.8541718314. The cubic root of 3900049 is about 157.4067508825.

The spelling of 3900049 in words is "three million, nine hundred thousand, forty-nine".