6991349 has 6 divisors (see below), whose sum is σ = 7247190. Its totient is φ = 6736520.

The previous prime is 6991319. The next prime is 6991363. The reversal of 6991349 is 9431996.

It can be written as a sum of positive squares in only one way, i.e., 6027025 + 964324 = 2455^2 + 982^2 .

It is not a de Polignac number, because 6991349 - 2⁸ = 6991093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13994 + ... + 14484.

It is an arithmetic number, because the mean of its divisors is an integer number (1207865).

Almost surely, 2^6991349 is an apocalyptic number.

It is an amenable number.

6991349 is a deficient number, since it is larger than the sum of its proper divisors (255841).

6991349 is an frugal number, since it uses more digits than its factorization.

6991349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 520 counting only the distinct ones).

The product of its digits is 52488, while the sum is 41.

The square root of 6991349 is about 2644.1159203030. The cubic root of 6991349 is about 191.2142821360.

It can be divided in two parts, 699 and 1349, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 6991349 in words is "six million, nine hundred ninety-one thousand, three hundred forty-nine".