670549331 has 2 divisors, whose sum is σ = 670549332. Its totient is φ = 670549330.

The previous prime is 670549289. The next prime is 670549351. The reversal of 670549331 is 133945076.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670549331 is a prime.

It is a super-2 number, since 2×670549331² = 899272810609095122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670549351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335274665 + 335274666.

It is an arithmetic number, because the mean of its divisors is an integer number (335274666).

Almost surely, 2^670549331 is an apocalyptic number.

670549331 is a deficient number, since it is larger than the sum of its proper divisors (1).

670549331 is an equidigital number, since it uses as much as digits as its factorization.

670549331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 670549331 is about 25894.9672909622. The cubic root of 670549331 is about 875.2730928796.

The spelling of 670549331 in words is "six hundred seventy million, five hundred forty-nine thousand, three hundred thirty-one".