704649091 has 4 divisors (see below), whose sum is σ = 735286032. Its totient is φ = 674012152.

The previous prime is 704649089. The next prime is 704649097. The reversal of 704649091 is 190946407.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190946407 = 1811 ⋅105437.

It is a cyclic number.

It is not a de Polignac number, because 704649091 - 2¹ = 704649089 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (704649097) 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, 15318436 + ... + 15318481.

It is an arithmetic number, because the mean of its divisors is an integer number (183821508).

Almost surely, 2^704649091 is an apocalyptic number.

704649091 is a deficient number, since it is larger than the sum of its proper divisors (30636941).

704649091 is a wasteful number, since it uses less digits than its factorization.

704649091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30636940.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 704649091 is about 26545.2272734667. The cubic root of 704649091 is about 889.8653547941.

The spelling of 704649091 in words is "seven hundred four million, six hundred forty-nine thousand, ninety-one".