63990409 has 8 divisors (see below), whose sum is σ = 73206720. Its totient is φ = 54792816.

The previous prime is 63990391. The next prime is 63990467. The reversal of 63990409 is 90409936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63990409 - 2¹⁷ = 63859337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63993409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3642 + ... + 11884.

It is an arithmetic number, because the mean of its divisors is an integer number (9150840).

Almost surely, 2^63990409 is an apocalyptic number.

It is an amenable number.

63990409 is a deficient number, since it is larger than the sum of its proper divisors (9216311).

63990409 is a wasteful number, since it uses less digits than its factorization.

63990409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9359.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 63990409 is about 7999.4005400405. The cubic root of 63990409 is about 399.9800177518.

The spelling of 63990409 in words is "sixty-three million, nine hundred ninety thousand, four hundred nine".