7139023 has 2 divisors, whose sum is σ = 7139024. Its totient is φ = 7139022.

The previous prime is 7139009. The next prime is 7139071. The reversal of 7139023 is 3209317.

7139023 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (3209317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7139023 - 2¹⁷ = 7007951 is a prime.

It is an Ulam number.

7139023 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7139123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569511 + 3569512.

It is an arithmetic number, because the mean of its divisors is an integer number (3569512).

Almost surely, 2^7139023 is an apocalyptic number.

7139023 is a deficient number, since it is larger than the sum of its proper divisors (1).

7139023 is an equidigital number, since it uses as much as digits as its factorization.

7139023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 7139023 is about 2671.8950203928. The cubic root of 7139023 is about 192.5512136745.

The spelling of 7139023 in words is "seven million, one hundred thirty-nine thousand, twenty-three".