671442533 has 2 divisors, whose sum is σ = 671442534. Its totient is φ = 671442532.

The previous prime is 671442521. The next prime is 671442581. The reversal of 671442533 is 335244176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635897089 + 35545444 = 25217^2 + 5962^2 .

It is a cyclic number.

It is not a de Polignac number, because 671442533 - 2¹⁴ = 671426149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671442493 and 671442502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671402533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335721266 + 335721267.

It is an arithmetic number, because the mean of its divisors is an integer number (335721267).

Almost surely, 2^671442533 is an apocalyptic number.

It is an amenable number.

671442533 is a deficient number, since it is larger than the sum of its proper divisors (1).

671442533 is an equidigital number, since it uses as much as digits as its factorization.

671442533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 35.

The square root of 671442533 is about 25912.2081845604. The cubic root of 671442533 is about 875.6615548806.

The spelling of 671442533 in words is "six hundred seventy-one million, four hundred forty-two thousand, five hundred thirty-three".