3619949 has 4 divisors (see below), whose sum is σ = 3643164. Its totient is φ = 3596736.

The previous prime is 3619921. The next prime is 3619961. The reversal of 3619949 is 9499163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9499163 = 1499 ⋅6337.

It can be written as a sum of positive squares in 2 ways, for example, as 2449225 + 1170724 = 1565^2 + 1082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3619949 is a prime.

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 (3619909) 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, 11372 + ... + 11685.

It is an arithmetic number, because the mean of its divisors is an integer number (910791).

Almost surely, 2^3619949 is an apocalyptic number.

It is an amenable number.

3619949 is a deficient number, since it is larger than the sum of its proper divisors (23215).

3619949 is a wasteful number, since it uses less digits than its factorization.

3619949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23214.

The product of its digits is 52488, while the sum is 41.

The square root of 3619949 is about 1902.6163564944. The cubic root of 3619949 is about 153.5444597418.

The spelling of 3619949 in words is "three million, six hundred nineteen thousand, nine hundred forty-nine".