5638920289 has 4 divisors (see below), whose sum is σ = 5673515056. Its totient is φ = 5604325524.

The previous prime is 5638920277. The next prime is 5638920307. The reversal of 5638920289 is 9820298365.

It is a happy number.

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 5638920289 - 2⁵ = 5638920257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5638920229) 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, 17297139 + ... + 17297464.

It is an arithmetic number, because the mean of its divisors is an integer number (1418378764).

Almost surely, 2^5638920289 is an apocalyptic number.

It is an amenable number.

5638920289 is a deficient number, since it is larger than the sum of its proper divisors (34594767).

5638920289 is a wasteful number, since it uses less digits than its factorization.

5638920289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34594766.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 5638920289 is about 75092.7445829489. The cubic root of 5638920289 is about 1779.9124950671.

The spelling of 5638920289 in words is "five billion, six hundred thirty-eight million, nine hundred twenty thousand, two hundred eighty-nine".