4591689449 has 4 divisors (see below), whose sum is σ = 4593407364. Its totient is φ = 4589971536.

The previous prime is 4591689439. The next prime is 4591689461. The reversal of 4591689449 is 9449861954.

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 1247149225 + 3344540224 = 35315^2 + 57832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4591689449 is a prime.

It is a super-2 number, since 2×4591689449² = 42167223992115847202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4591689439) 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, 854942 + ... + 860295.

It is an arithmetic number, because the mean of its divisors is an integer number (1148351841).

Almost surely, 2^4591689449 is an apocalyptic number.

It is an amenable number.

4591689449 is a deficient number, since it is larger than the sum of its proper divisors (1717915).

4591689449 is a wasteful number, since it uses less digits than its factorization.

4591689449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717914.

The product of its digits is 11197440, while the sum is 59.

The square root of 4591689449 is about 67762.0059399071. The cubic root of 4591689449 is about 1662.1013511457.

The spelling of 4591689449 in words is "four billion, five hundred ninety-one million, six hundred eighty-nine thousand, four hundred forty-nine".