5387981 has 4 divisors (see below), whose sum is σ = 5416092. Its totient is φ = 5359872.

The previous prime is 5387951. The next prime is 5387983. The reversal of 5387981 is 1897835.

It is a happy number.

5387981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3455881 + 1932100 = 1859^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 5387981 - 2⁶ = 5387917 is a prime.

It is a super-2 number, since 2×5387981² = 58060678512722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5387983) 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, 13766 + ... + 14151.

It is an arithmetic number, because the mean of its divisors is an integer number (1354023).

Almost surely, 2^5387981 is an apocalyptic number.

It is an amenable number.

5387981 is a deficient number, since it is larger than the sum of its proper divisors (28111).

5387981 is a wasteful number, since it uses less digits than its factorization.

5387981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28110.

The product of its digits is 60480, while the sum is 41.

The square root of 5387981 is about 2321.2024900900. The cubic root of 5387981 is about 175.3108054960.

The spelling of 5387981 in words is "five million, three hundred eighty-seven thousand, nine hundred eighty-one".