6971491 has 4 divisors (see below), whose sum is σ = 6987672. Its totient is φ = 6955312.

The previous prime is 6971477. The next prime is 6971509. The reversal of 6971491 is 1941796.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6971491 - 2²¹ = 4874339 is a prime.

It is a Duffinian number.

6971491 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6971491.

It is not an unprimeable number, because it can be changed into a prime (6971401) 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, 7426 + ... + 8311.

It is an arithmetic number, because the mean of its divisors is an integer number (1746918).

Almost surely, 2^6971491 is an apocalyptic number.

6971491 is a deficient number, since it is larger than the sum of its proper divisors (16181).

6971491 is a wasteful number, since it uses less digits than its factorization.

6971491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16180.

The product of its digits is 13608, while the sum is 37.

The square root of 6971491 is about 2640.3581196497. The cubic root of 6971491 is about 191.0330708523.

The spelling of 6971491 in words is "six million, nine hundred seventy-one thousand, four hundred ninety-one".