5138391 has 8 divisors (see below), whose sum is σ = 6862464. Its totient is φ = 3419960.

The previous prime is 5138387. The next prime is 5138443. The reversal of 5138391 is 1938315.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5138391 - 2² = 5138387 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5138311) 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, 1696 + ... + 3626.

It is an arithmetic number, because the mean of its divisors is an integer number (857808).

Almost surely, 2^5138391 is an apocalyptic number.

5138391 is a deficient number, since it is larger than the sum of its proper divisors (1724073).

5138391 is a wasteful number, since it uses less digits than its factorization.

5138391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821.

The product of its digits is 3240, while the sum is 30.

The square root of 5138391 is about 2266.8019322385. The cubic root of 5138391 is about 172.5608942752.

The spelling of 5138391 in words is "five million, one hundred thirty-eight thousand, three hundred ninety-one".