7138389 has 8 divisors (see below), whose sum is σ = 9530272. Its totient is φ = 4752720.

The previous prime is 7138367. The next prime is 7138393. The reversal of 7138389 is 9838317.

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

It is not a de Polignac number, because 7138389 - 2⁹ = 7137877 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 (7138309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3282 + ... + 5004.

It is an arithmetic number, because the mean of its divisors is an integer number (1191284).

Almost surely, 2^7138389 is an apocalyptic number.

It is an amenable number.

7138389 is a deficient number, since it is larger than the sum of its proper divisors (2391883).

7138389 is a wasteful number, since it uses less digits than its factorization.

7138389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107.

The product of its digits is 36288, while the sum is 39.

The square root of 7138389 is about 2671.7763753728. The cubic root of 7138389 is about 192.5455134975.

The spelling of 7138389 in words is "seven million, one hundred thirty-eight thousand, three hundred eighty-nine".