63509345 has 4 divisors (see below), whose sum is σ = 76211220. Its totient is φ = 50807472.

The previous prime is 63509339. The next prime is 63509351. The reversal of 63509345 is 54390536.

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 (63509339) and next prime (63509351).

It can be written as a sum of positive squares in 2 ways, for example, as 37540129 + 25969216 = 6127^2 + 5096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63509345 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6350930 + ... + 6350939.

It is an arithmetic number, because the mean of its divisors is an integer number (19052805).

Almost surely, 2^63509345 is an apocalyptic number.

It is an amenable number.

63509345 is a deficient number, since it is larger than the sum of its proper divisors (12701875).

63509345 is a wasteful number, since it uses less digits than its factorization.

63509345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12701874.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 63509345 is about 7969.2750611332. The cubic root of 63509345 is about 398.9751786788.

The spelling of 63509345 in words is "sixty-three million, five hundred nine thousand, three hundred forty-five".