691883355 has 16 divisors (see below), whose sum is σ = 1155144960. Its totient is φ = 352960608.

The previous prime is 691883351. The next prime is 691883369. The reversal of 691883355 is 553388196.

It is not a de Polignac number, because 691883355 - 2² = 691883351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (691883351) 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, 1002385 + ... + 1003074.

It is an arithmetic number, because the mean of its divisors is an integer number (72196560).

Almost surely, 2^691883355 is an apocalyptic number.

691883355 is a deficient number, since it is larger than the sum of its proper divisors (463261605).

691883355 is a wasteful number, since it uses less digits than its factorization.

691883355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005490.

The product of its digits is 777600, while the sum is 48.

The square root of 691883355 is about 26303.6756937125. The cubic root of 691883355 is about 884.4588411734.

The spelling of 691883355 in words is "six hundred ninety-one million, eight hundred eighty-three thousand, three hundred fifty-five".