7131691 has 4 divisors (see below), whose sum is σ = 8150512. Its totient is φ = 6112872.

The previous prime is 7131689. The next prime is 7131701. The reversal of 7131691 is 1961317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1961317 = 41 ⋅47837.

It is a cyclic number.

It is not a de Polignac number, because 7131691 - 2¹ = 7131689 is a prime.

It is a super-2 number, since 2×7131691² = 101722033038962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7131601) 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, 509400 + ... + 509413.

It is an arithmetic number, because the mean of its divisors is an integer number (2037628).

Almost surely, 2^7131691 is an apocalyptic number.

7131691 is a deficient number, since it is larger than the sum of its proper divisors (1018821).

7131691 is a wasteful number, since it uses less digits than its factorization.

7131691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018820.

The product of its digits is 1134, while the sum is 28.

The square root of 7131691 is about 2670.5226080301. The cubic root of 7131691 is about 192.4852723876.

The spelling of 7131691 in words is "seven million, one hundred thirty-one thousand, six hundred ninety-one".