63680249 has 4 divisors (see below), whose sum is σ = 67426164. Its totient is φ = 59934336.

The previous prime is 63680161. The next prime is 63680251. The reversal of 63680249 is 94208636.

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 17372224 + 46308025 = 4168^2 + 6805^2 .

It is a cyclic number.

It is not a de Polignac number, because 63680249 - 2¹⁶ = 63614713 is a prime.

It is a super-2 number, since 2×63680249² = 8110348225404002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63680269) 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, 1872932 + ... + 1872965.

It is an arithmetic number, because the mean of its divisors is an integer number (16856541).

Almost surely, 2^63680249 is an apocalyptic number.

It is an amenable number.

63680249 is a deficient number, since it is larger than the sum of its proper divisors (3745915).

63680249 is a wasteful number, since it uses less digits than its factorization.

63680249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745914.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 63680249 is about 7979.9905388415. The cubic root of 63680249 is about 399.3327396112.

The spelling of 63680249 in words is "sixty-three million, six hundred eighty thousand, two hundred forty-nine".