63625539 has 4 divisors (see below), whose sum is σ = 84834056. Its totient is φ = 42417024.

The previous prime is 63625537. The next prime is 63625561. The reversal of 63625539 is 93552636.

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

It is not a de Polignac number, because 63625539 - 2¹ = 63625537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63625497 and 63625506.

It is not an unprimeable number, because it can be changed into a prime (63625537) 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, 10604254 + ... + 10604259.

It is an arithmetic number, because the mean of its divisors is an integer number (21208514).

Almost surely, 2^63625539 is an apocalyptic number.

63625539 is a deficient number, since it is larger than the sum of its proper divisors (21208517).

63625539 is a wasteful number, since it uses less digits than its factorization.

63625539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21208516.

The product of its digits is 145800, while the sum is 39.

The square root of 63625539 is about 7976.5618533300. The cubic root of 63625539 is about 399.2183464560.

The spelling of 63625539 in words is "sixty-three million, six hundred twenty-five thousand, five hundred thirty-nine".