671609833 has 2 divisors, whose sum is σ = 671609834. Its totient is φ = 671609832.

The previous prime is 671609801. The next prime is 671609863. The reversal of 671609833 is 338906176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 532086489 + 139523344 = 23067^2 + 11812^2 .

It is a cyclic number.

It is not a de Polignac number, because 671609833 - 2⁵ = 671609801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671609833.

It is not a weakly prime, because it can be changed into another prime (671609863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335804916 + 335804917.

It is an arithmetic number, because the mean of its divisors is an integer number (335804917).

Almost surely, 2^671609833 is an apocalyptic number.

It is an amenable number.

671609833 is a deficient number, since it is larger than the sum of its proper divisors (1).

671609833 is an equidigital number, since it uses as much as digits as its factorization.

671609833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 671609833 is about 25915.4361915828. The cubic root of 671609833 is about 875.7342769207.

The spelling of 671609833 in words is "six hundred seventy-one million, six hundred nine thousand, eight hundred thirty-three".