591671961 has 12 divisors (see below), whose sum is σ = 904910292. Its totient is φ = 371245056.

The previous prime is 591671953. The next prime is 591671981. The reversal of 591671961 is 169176195.

It can be written as a sum of positive squares in 2 ways, for example, as 229340736 + 362331225 = 15144^2 + 19035^2 .

It is not a de Polignac number, because 591671961 - 2³ = 591671953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (591671981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1933416 + ... + 1933721.

It is an arithmetic number, because the mean of its divisors is an integer number (75409191).

Almost surely, 2^591671961 is an apocalyptic number.

591671961 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

591671961 is a deficient number, since it is larger than the sum of its proper divisors (313238331).

591671961 is a wasteful number, since it uses less digits than its factorization.

591671961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867160 (or 3867157 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 591671961 is about 24324.3080271567. The cubic root of 591671961 is about 839.5121699788.

It can be divided in two parts, 5916 and 71961, that added together give a palindrome (77877).

The spelling of 591671961 in words is "five hundred ninety-one million, six hundred seventy-one thousand, nine hundred sixty-one".