7131790 has 16 divisors (see below), whose sum is σ = 12870000. Its totient is φ = 2845440.

The previous prime is 7131779. The next prime is 7131793. The reversal of 7131790 is 971317.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7131793) 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, 5086 + ... + 6334.

It is an arithmetic number, because the mean of its divisors is an integer number (804375).

Almost surely, 2^7131790 is an apocalyptic number.

7131790 is a deficient number, since it is larger than the sum of its proper divisors (5738210).

7131790 is a wasteful number, since it uses less digits than its factorization.

7131790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827.

The product of its (nonzero) digits is 1323, while the sum is 28.

The square root of 7131790 is about 2670.5411436636. The cubic root of 7131790 is about 192.4861630578.

Multiplying 7131790 by its sum of digits (28), we get a triangular number (199690120 = T₁₉₉₈₄).

It can be divided in two parts, 7131 and 790, that added together give a square (7921 = 89²).

The spelling of 7131790 in words is "seven million, one hundred thirty-one thousand, seven hundred ninety".