636598 has 4 divisors (see below), whose sum is σ = 954900. Its totient is φ = 318298.

The previous prime is 636569. The next prime is 636613. The reversal of 636598 is 895636.

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

It is a congruent number.

It is an unprimeable number.

636598 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159148 + ... + 159151.

It is an arithmetic number, because the mean of its divisors is an integer number (238725).

2⁶³⁶⁵⁹⁸ is an apocalyptic number.

636598 is a deficient number, since it is larger than the sum of its proper divisors (318302).

636598 is a wasteful number, since it uses less digits than its factorization.

636598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318301.

The product of its digits is 38880, while the sum is 37.

The square root of 636598 is about 797.8709168782. The cubic root of 636598 is about 86.0244206833.

The spelling of 636598 in words is "six hundred thirty-six thousand, five hundred ninety-eight".