4591973609 has 4 divisors (see below), whose sum is σ = 4596917460. Its totient is φ = 4587029760.

The previous prime is 4591973597. The next prime is 4591973623. The reversal of 4591973609 is 9063791954.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 217474009 + 4374499600 = 14747^2 + 66140^2 .

It is a cyclic number.

It is not a de Polignac number, because 4591973609 - 2²⁴ = 4575196393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4591973629) 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, 2470532 + ... + 2472389.

It is an arithmetic number, because the mean of its divisors is an integer number (1149229365).

Almost surely, 2^4591973609 is an apocalyptic number.

It is an amenable number.

4591973609 is a deficient number, since it is larger than the sum of its proper divisors (4943851).

4591973609 is an equidigital number, since it uses as much as digits as its factorization.

4591973609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943850.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The square root of 4591973609 is about 67764.1026576756. The cubic root of 4591973609 is about 1662.1356372172.

The spelling of 4591973609 in words is "four billion, five hundred ninety-one million, nine hundred seventy-three thousand, six hundred nine".