3631949 has 4 divisors (see below), whose sum is σ = 3650400. Its totient is φ = 3613500.

The previous prime is 3631937. The next prime is 3631951. The reversal of 3631949 is 9491363.

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 a de Polignac number, because none of the positive numbers 2^k-3631949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3631919) 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, 8927 + ... + 9324.

It is an arithmetic number, because the mean of its divisors is an integer number (912600).

Almost surely, 2^3631949 is an apocalyptic number.

It is an amenable number.

3631949 is a deficient number, since it is larger than the sum of its proper divisors (18451).

3631949 is a wasteful number, since it uses less digits than its factorization.

3631949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18450.

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

The square root of 3631949 is about 1905.7672995411. The cubic root of 3631949 is about 153.7139373856.

The spelling of 3631949 in words is "three million, six hundred thirty-one thousand, nine hundred forty-nine".