63442909 has 4 divisors (see below), whose sum is σ = 63645916. Its totient is φ = 63239904.

The previous prime is 63442891. The next prime is 63442927. The reversal of 63442909 is 90924436.

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

It is an interprime number because it is at equal distance from previous prime (63442891) and next prime (63442927).

It can be written as a sum of positive squares in 2 ways, for example, as 1898884 + 61544025 = 1378^2 + 7845^2 .

It is a cyclic number.

It is not a de Polignac number, because 63442909 - 2⁹ = 63442397 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 (63442969) 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, 101034 + ... + 101659.

It is an arithmetic number, because the mean of its divisors is an integer number (15911479).

Almost surely, 2^63442909 is an apocalyptic number.

It is an amenable number.

63442909 is a deficient number, since it is larger than the sum of its proper divisors (203007).

63442909 is a wasteful number, since it uses less digits than its factorization.

63442909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203006.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 63442909 is about 7965.1057117906. The cubic root of 63442909 is about 398.8360098529.

The spelling of 63442909 in words is "sixty-three million, four hundred forty-two thousand, nine hundred nine".