670146329 has 2 divisors, whose sum is σ = 670146330. Its totient is φ = 670146328.

The previous prime is 670146299. The next prime is 670146343. The reversal of 670146329 is 923641076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623251225 + 46895104 = 24965^2 + 6848^2 .

It is a cyclic number.

It is not a de Polignac number, because 670146329 - 2²⁰ = 669097753 is a prime.

It is a super-2 number, since 2×670146329² = 898192204544352482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 670146292 and 670146301.

It is not a weakly prime, because it can be changed into another prime (670140329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335073164 + 335073165.

It is an arithmetic number, because the mean of its divisors is an integer number (335073165).

Almost surely, 2^670146329 is an apocalyptic number.

It is an amenable number.

670146329 is a deficient number, since it is larger than the sum of its proper divisors (1).

670146329 is an equidigital number, since it uses as much as digits as its factorization.

670146329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 670146329 is about 25887.1846480068. The cubic root of 670146329 is about 875.0977105577.

The spelling of 670146329 in words is "six hundred seventy million, one hundred forty-six thousand, three hundred twenty-nine".