5639171989 has 4 divisors (see below), whose sum is σ = 6151824000. Its totient is φ = 5126519980.

The previous prime is 5639171933. The next prime is 5639172043. The reversal of 5639171989 is 9891719365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5639171989 - 2⁹ = 5639171477 is a prime.

It is a super-2 number, since 2×5639171989² = 63600521443044432242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5639171929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256325989 + ... + 256326010.

It is an arithmetic number, because the mean of its divisors is an integer number (1537956000).

Almost surely, 2^5639171989 is an apocalyptic number.

It is an amenable number.

5639171989 is a deficient number, since it is larger than the sum of its proper divisors (512652011).

5639171989 is a wasteful number, since it uses less digits than its factorization.

5639171989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512652010.

The product of its digits is 3674160, while the sum is 58.

The square root of 5639171989 is about 75094.4204918048. The cubic root of 5639171989 is about 1779.9389775192.

The spelling of 5639171989 in words is "five billion, six hundred thirty-nine million, one hundred seventy-one thousand, nine hundred eighty-nine".