5637998 has 4 divisors (see below), whose sum is σ = 8457000. Its totient is φ = 2818998.

The previous prime is 5637997. The next prime is 5638019. The reversal of 5637998 is 8997365.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5637997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1409498 + ... + 1409501.

It is an arithmetic number, because the mean of its divisors is an integer number (2114250).

Almost surely, 2^5637998 is an apocalyptic number.

5637998 is a deficient number, since it is larger than the sum of its proper divisors (2819002).

5637998 is a wasteful number, since it uses less digits than its factorization.

5637998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819001.

The product of its digits is 408240, while the sum is 47.

The square root of 5637998 is about 2374.4468829603. The cubic root of 5637998 is about 177.9815450294.

The spelling of 5637998 in words is "five million, six hundred thirty-seven thousand, nine hundred ninety-eight".