63649949 has 4 divisors (see below), whose sum is σ = 69436320. Its totient is φ = 57863580.

The previous prime is 63649931. The next prime is 63649991. The reversal of 63649949 is 94994636.

It is a happy number.

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 not a de Polignac number, because 63649949 - 2²⁴ = 46872733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 63649897 and 63649906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63649909) 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, 2893169 + ... + 2893190.

It is an arithmetic number, because the mean of its divisors is an integer number (17359080).

Almost surely, 2^63649949 is an apocalyptic number.

It is an amenable number.

63649949 is a deficient number, since it is larger than the sum of its proper divisors (5786371).

63649949 is a wasteful number, since it uses less digits than its factorization.

63649949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5786370.

The product of its digits is 1259712, while the sum is 50.

The square root of 63649949 is about 7978.0918144629. The cubic root of 63649949 is about 399.2693934309.

The spelling of 63649949 in words is "sixty-three million, six hundred forty-nine thousand, nine hundred forty-nine".