7138311 has 4 divisors (see below), whose sum is σ = 9517752. Its totient is φ = 4758872.

The previous prime is 7138309. The next prime is 7138331. The reversal of 7138311 is 1138317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1138317 = 3 ⋅379439.

It is a cyclic number.

It is not a de Polignac number, because 7138311 - 2¹ = 7138309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138331) 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, 1189716 + ... + 1189721.

It is an arithmetic number, because the mean of its divisors is an integer number (2379438).

Almost surely, 2^7138311 is an apocalyptic number.

7138311 is a deficient number, since it is larger than the sum of its proper divisors (2379441).

7138311 is a wasteful number, since it uses less digits than its factorization.

7138311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379440.

The product of its digits is 504, while the sum is 24.

The square root of 7138311 is about 2671.7617783028. The cubic root of 7138311 is about 192.5448121906.

The spelling of 7138311 in words is "seven million, one hundred thirty-eight thousand, three hundred eleven".