5631993 has 6 divisors (see below), whose sum is σ = 8135114. Its totient is φ = 3754656.

The previous prime is 5631991. The next prime is 5632001. The reversal of 5631993 is 3991365.

5631993 is a `hidden beast` number, since 563 + 1 + 9 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5212089 + 419904 = 2283^2 + 648^2 .

It is not a de Polignac number, because 5631993 - 2¹ = 5631991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5631991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 312880 + ... + 312897.

Almost surely, 2^5631993 is an apocalyptic number.

It is an amenable number.

5631993 is a deficient number, since it is larger than the sum of its proper divisors (2503121).

5631993 is a wasteful number, since it uses less digits than its factorization.

5631993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625783 (or 625780 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 5631993 is about 2373.1820410580. The cubic root of 5631993 is about 177.9183335341.

It can be divided in two parts, 563 and 1993, that added together give a triangular number (2556 = T₇₁).

The spelling of 5631993 in words is "five million, six hundred thirty-one thousand, nine hundred ninety-three".