637487 has 4 divisors (see below), whose sum is σ = 639816. Its totient is φ = 635160.

The previous prime is 637471. The next prime is 637489. The reversal of 637487 is 784736.

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

It is a cyclic number.

It is not a de Polignac number, because 637487 - 2⁴ = 637471 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (637489) 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, 689 + ... + 1322.

It is an arithmetic number, because the mean of its divisors is an integer number (159954).

2⁶³⁷⁴⁸⁷ is an apocalyptic number.

637487 is a deficient number, since it is larger than the sum of its proper divisors (2329).

637487 is a wasteful number, since it uses less digits than its factorization.

637487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328.

The product of its digits is 28224, while the sum is 35.

The square root of 637487 is about 798.4278301763. The cubic root of 637487 is about 86.0644460151.

The spelling of 637487 in words is "six hundred thirty-seven thousand, four hundred eighty-seven".