3649139 has 4 divisors (see below), whose sum is σ = 3929856. Its totient is φ = 3368424.

The previous prime is 3649133. The next prime is 3649147. The reversal of 3649139 is 9319463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3649139 - 2¹⁶ = 3583603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3649099 and 3649108.

It is not an unprimeable number, because it can be changed into a prime (3649133) 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, 140339 + ... + 140364.

It is an arithmetic number, because the mean of its divisors is an integer number (982464).

Almost surely, 2^3649139 is an apocalyptic number.

3649139 is a deficient number, since it is larger than the sum of its proper divisors (280717).

3649139 is a wasteful number, since it uses less digits than its factorization.

3649139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280716.

The product of its digits is 17496, while the sum is 35.

The square root of 3649139 is about 1910.2719701655. The cubic root of 3649139 is about 153.9560649392.

The spelling of 3649139 in words is "three million, six hundred forty-nine thousand, one hundred thirty-nine".