63940249 has 4 divisors (see below), whose sum is σ = 64058980. Its totient is φ = 63821520.

The previous prime is 63940243. The next prime is 63940267. The reversal of 63940249 is 94204936.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46676224 + 17264025 = 6832^2 + 4155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63940249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63940243) 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, 58554 + ... + 59635.

It is an arithmetic number, because the mean of its divisors is an integer number (16014745).

Almost surely, 2^63940249 is an apocalyptic number.

It is an amenable number.

63940249 is a deficient number, since it is larger than the sum of its proper divisors (118731).

63940249 is a wasteful number, since it uses less digits than its factorization.

63940249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118730.

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

The square root of 63940249 is about 7996.2646904664. The cubic root of 63940249 is about 399.8754799909.

The spelling of 63940249 in words is "sixty-three million, nine hundred forty thousand, two hundred forty-nine".