5639745 has 8 divisors (see below), whose sum is σ = 9023616. Its totient is φ = 3007856.

The previous prime is 5639741. The next prime is 5639749. The reversal of 5639745 is 5479365.

It is an interprime number because it is at equal distance from previous prime (5639741) and next prime (5639749).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5639745 - 2² = 5639741 is a prime.

5639745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5639741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187977 + ... + 188006.

It is an arithmetic number, because the mean of its divisors is an integer number (1127952).

Almost surely, 2^5639745 is an apocalyptic number.

It is an amenable number.

5639745 is a deficient number, since it is larger than the sum of its proper divisors (3383871).

5639745 is a wasteful number, since it uses less digits than its factorization.

5639745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375991.

The product of its digits is 113400, while the sum is 39.

The square root of 5639745 is about 2374.8147296158. The cubic root of 5639745 is about 177.9999263561. Note that the first 4 decimals are identical.

The spelling of 5639745 in words is "five million, six hundred thirty-nine thousand, seven hundred forty-five".