671530537 has 2 divisors, whose sum is σ = 671530538. Its totient is φ = 671530536.

The previous prime is 671530529. The next prime is 671530591. The reversal of 671530537 is 735035176.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385886736 + 285643801 = 19644^2 + 16901^2 .

It is a cyclic number.

It is not a de Polignac number, because 671530537 - 2³ = 671530529 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 671530496 and 671530505.

It is not a weakly prime, because it can be changed into another prime (671530337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335765268 + 335765269.

It is an arithmetic number, because the mean of its divisors is an integer number (335765269).

Almost surely, 2^671530537 is an apocalyptic number.

It is an amenable number.

671530537 is a deficient number, since it is larger than the sum of its proper divisors (1).

671530537 is an equidigital number, since it uses as much as digits as its factorization.

671530537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66150, while the sum is 37.

The square root of 671530537 is about 25913.9062474186. The cubic root of 671530537 is about 875.6998100051.

The spelling of 671530537 in words is "six hundred seventy-one million, five hundred thirty thousand, five hundred thirty-seven".