5637994 has 4 divisors (see below), whose sum is σ = 8456994. Its totient is φ = 2818996.

The previous prime is 5637959. The next prime is 5637997. The reversal of 5637994 is 4997365.

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

It can be written as a sum of positive squares in only one way, i.e., 4566769 + 1071225 = 2137^2 + 1035^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 5637994.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1409497 + ... + 1409500.

Almost surely, 2^5637994 is an apocalyptic number.

5637994 is a deficient number, since it is larger than the sum of its proper divisors (2819000).

5637994 is a wasteful number, since it uses less digits than its factorization.

5637994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818999.

The product of its digits is 204120, while the sum is 43.

The square root of 5637994 is about 2374.4460406587. The cubic root of 5637994 is about 177.9815029384.

The spelling of 5637994 in words is "five million, six hundred thirty-seven thousand, nine hundred ninety-four".