63128537 has 4 divisors (see below), whose sum is σ = 65873280. Its totient is φ = 60383796.

The previous prime is 63128521. The next prime is 63128543. The reversal of 63128537 is 73582136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63128537 - 2⁴ = 63128521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63128497 and 63128506.

It is not an unprimeable number, because it can be changed into a prime (63128557) 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, 1372337 + ... + 1372382.

It is an arithmetic number, because the mean of its divisors is an integer number (16468320).

Almost surely, 2^63128537 is an apocalyptic number.

It is an amenable number.

63128537 is a deficient number, since it is larger than the sum of its proper divisors (2744743).

63128537 is a wasteful number, since it uses less digits than its factorization.

63128537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744742.

The product of its digits is 30240, while the sum is 35.

The square root of 63128537 is about 7945.3468772609. The cubic root of 63128537 is about 398.1761486383.

The spelling of 63128537 in words is "sixty-three million, one hundred twenty-eight thousand, five hundred thirty-seven".