5138661 has 8 divisors (see below), whose sum is σ = 7474464. Its totient is φ = 3114320.

The previous prime is 5138657. The next prime is 5138663. The reversal of 5138661 is 1668315.

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

It is not a de Polignac number, because 5138661 - 2² = 5138657 is a prime.

It is a super-3 number, since 3×5138661³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5138663) 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, 77826 + ... + 77891.

It is an arithmetic number, because the mean of its divisors is an integer number (934308).

Almost surely, 2^5138661 is an apocalyptic number.

It is an amenable number.

5138661 is a deficient number, since it is larger than the sum of its proper divisors (2335803).

5138661 is a wasteful number, since it uses less digits than its factorization.

5138661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155731.

The product of its digits is 4320, while the sum is 30.

The square root of 5138661 is about 2266.8614867256. The cubic root of 5138661 is about 172.5639166626.

The spelling of 5138661 in words is "five million, one hundred thirty-eight thousand, six hundred sixty-one".