691004361 has 8 divisors (see below), whose sum is σ = 921916800. Its totient is φ = 460380752.

The previous prime is 691004357. The next prime is 691004383. The reversal of 691004361 is 163400196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 691004361 - 2² = 691004357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (691004311) 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 7 ways as a sum of consecutive naturals, for example, 66561 + ... + 76238.

It is an arithmetic number, because the mean of its divisors is an integer number (115239600).

Almost surely, 2^691004361 is an apocalyptic number.

It is an amenable number.

691004361 is a deficient number, since it is larger than the sum of its proper divisors (230912439).

691004361 is a wasteful number, since it uses less digits than its factorization.

691004361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144415.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 691004361 is about 26286.9618061883. The cubic root of 691004361 is about 884.0841327930.

The spelling of 691004361 in words is "six hundred ninety-one million, four thousand, three hundred sixty-one".