7131687723 has 24 divisors (see below), whose sum is σ = 10567262160. Its totient is φ = 4632042240.

The previous prime is 7131687713. The next prime is 7131687727. The reversal of 7131687723 is 3277861317.

It is not a de Polignac number, because 7131687723 - 2⁴ = 7131687707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7131687727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259615 + ... + 285767.

It is an arithmetic number, because the mean of its divisors is an integer number (440302590).

Almost surely, 2^7131687723 is an apocalyptic number.

7131687723 is a deficient number, since it is larger than the sum of its proper divisors (3435574437).

7131687723 is a wasteful number, since it uses less digits than its factorization.

7131687723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26939 (or 26936 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 7131687723 is about 84449.3204413156. The cubic root of 7131687723 is about 1924.8524290540.

The spelling of 7131687723 in words is "seven billion, one hundred thirty-one million, six hundred eighty-seven thousand, seven hundred twenty-three".