63509375 has 12 divisors (see below), whose sum is σ = 79385544. Its totient is φ = 50805000.

The previous prime is 63509351. The next prime is 63509387. The reversal of 63509375 is 57390536.

It is not a de Polignac number, because 63509375 - 2¹⁰ = 63508351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7037 + ... + 13286.

It is an arithmetic number, because the mean of its divisors is an integer number (6615462).

Almost surely, 2^63509375 is an apocalyptic number.

63509375 is a deficient number, since it is larger than the sum of its proper divisors (15876169).

63509375 is an frugal number, since it uses more digits than its factorization.

63509375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20348 (or 20328 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 38.

The square root of 63509375 is about 7969.2769433619. The cubic root of 63509375 is about 398.9752415003.

The spelling of 63509375 in words is "sixty-three million, five hundred nine thousand, three hundred seventy-five".