63990293 has 8 divisors (see below), whose sum is σ = 67042560. Its totient is φ = 60999840.

The previous prime is 63990259. The next prime is 63990307. The reversal of 63990293 is 39209936.

It is a happy number.

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 63990293 - 2²⁰ = 62941717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63990293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63990203) 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, 13328 + ... + 17481.

It is an arithmetic number, because the mean of its divisors is an integer number (8380320).

Almost surely, 2^63990293 is an apocalyptic number.

It is an amenable number.

63990293 is a deficient number, since it is larger than the sum of its proper divisors (3052267).

63990293 is a wasteful number, since it uses less digits than its factorization.

63990293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30907.

The product of its (nonzero) digits is 78732, while the sum is 41.

The square root of 63990293 is about 7999.3932894939. The cubic root of 63990293 is about 399.9797760608.

The spelling of 63990293 in words is "sixty-three million, nine hundred ninety thousand, two hundred ninety-three".