5398861 has 8 divisors (see below), whose sum is σ = 5894840. Its totient is φ = 4914432.

The previous prime is 5398849. The next prime is 5398873. The reversal of 5398861 is 1688935.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5398849) and next prime (5398873).

It can be written as a sum of positive squares in 4 ways, for example, as 1322500 + 4076361 = 1150^2 + 2019^2 .

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

It is a 5-Lehmer number, since φ(5398861) divides (5398861-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 5398861 - 2⁷ = 5398733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5398891) 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, 1896 + ... + 3793.

It is an arithmetic number, because the mean of its divisors is an integer number (736855).

Almost surely, 2^5398861 is an apocalyptic number.

It is an amenable number.

5398861 is a deficient number, since it is larger than the sum of its proper divisors (495979).

5398861 is a wasteful number, since it uses less digits than its factorization.

5398861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5775.

The product of its digits is 51840, while the sum is 40.

The square root of 5398861 is about 2323.5449210205. The cubic root of 5398861 is about 175.4287284024.

The spelling of 5398861 in words is "five million, three hundred ninety-eight thousand, eight hundred sixty-one".