704491091 has 4 divisors (see below), whose sum is σ = 704560752. Its totient is φ = 704421432.

The previous prime is 704491087. The next prime is 704491129. The reversal of 704491091 is 190194407.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 704491091 - 2² = 704491087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (704491061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16415 + ... + 40968.

It is an arithmetic number, because the mean of its divisors is an integer number (176140188).

Almost surely, 2^704491091 is an apocalyptic number.

704491091 is a deficient number, since it is larger than the sum of its proper divisors (69661).

704491091 is a wasteful number, since it uses less digits than its factorization.

704491091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69660.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 704491091 is about 26542.2510537445. The cubic root of 704491091 is about 889.7988397784.

The spelling of 704491091 in words is "seven hundred four million, four hundred ninety-one thousand, ninety-one".