5391998 has 4 divisors (see below), whose sum is σ = 8088000. Its totient is φ = 2695998.

The previous prime is 5391989. The next prime is 5392001. The reversal of 5391998 is 8991935.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8991935 = 5 ⋅1798387.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1347998 + ... + 1348001.

It is an arithmetic number, because the mean of its divisors is an integer number (2022000).

Almost surely, 2^5391998 is an apocalyptic number.

5391998 is a deficient number, since it is larger than the sum of its proper divisors (2696002).

5391998 is a wasteful number, since it uses less digits than its factorization.

5391998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696001.

The product of its digits is 87480, while the sum is 44.

The square root of 5391998 is about 2322.0676131414. The cubic root of 5391998 is about 175.3543622301.

The spelling of 5391998 in words is "five million, three hundred ninety-one thousand, nine hundred ninety-eight".