6991479 has 12 divisors (see below), whose sum is σ = 11017032. Its totient is φ = 4237200.

The previous prime is 6991463. The next prime is 6991493. The reversal of 6991479 is 9741996.

It is not a de Polignac number, because 6991479 - 2⁴ = 6991463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35212 + ... + 35409.

It is an arithmetic number, because the mean of its divisors is an integer number (918086).

Almost surely, 2^6991479 is an apocalyptic number.

6991479 is a deficient number, since it is larger than the sum of its proper divisors (4025553).

6991479 is a wasteful number, since it uses less digits than its factorization.

6991479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70638 (or 70635 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 6991479 is about 2644.1405030747. The cubic root of 6991479 is about 191.2154673009.

The spelling of 6991479 in words is "six million, nine hundred ninety-one thousand, four hundred seventy-nine".