704636641 has 4 divisors (see below), whose sum is σ = 741722800. Its totient is φ = 667550484.

The previous prime is 704636633. The next prime is 704636659. The reversal of 704636641 is 146636407.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 704636641 - 2³ = 704636633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 704636641.

It is not an unprimeable number, because it can be changed into a prime (704636341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18543051 + ... + 18543088.

It is an arithmetic number, because the mean of its divisors is an integer number (185430700).

Almost surely, 2^704636641 is an apocalyptic number.

It is an amenable number.

704636641 is a deficient number, since it is larger than the sum of its proper divisors (37086159).

704636641 is a wasteful number, since it uses less digits than its factorization.

704636641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37086158.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 704636641 is about 26544.9927669984. The cubic root of 704636641 is about 889.8601139401.

It can be divided in two parts, 7046366 and 41, that added together give a palindrome (7046407).

The spelling of 704636641 in words is "seven hundred four million, six hundred thirty-six thousand, six hundred forty-one".