691304349 has 16 divisors (see below), whose sum is σ = 959253120. Its totient is φ = 442303680.

The previous prime is 691304311. The next prime is 691304377. The reversal of 691304349 is 943403196.

It is not a de Polignac number, because 691304349 - 2⁷ = 691304221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691304389) 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 15 ways as a sum of consecutive naturals, for example, 9262 + ... + 38319.

It is an arithmetic number, because the mean of its divisors is an integer number (59953320).

Almost surely, 2^691304349 is an apocalyptic number.

It is an amenable number.

691304349 is a deficient number, since it is larger than the sum of its proper divisors (267948771).

691304349 is a wasteful number, since it uses less digits than its factorization.

691304349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47780.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 691304349 is about 26292.6672096994. The cubic root of 691304349 is about 884.2120510694.

The spelling of 691304349 in words is "six hundred ninety-one million, three hundred four thousand, three hundred forty-nine".