670030981 has 2 divisors, whose sum is σ = 670030982. Its totient is φ = 670030980.

The previous prime is 670030973. The next prime is 670030997. The reversal of 670030981 is 189030076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575280225 + 94750756 = 23985^2 + 9734^2 .

It is a cyclic number.

It is not a de Polignac number, because 670030981 - 2³ = 670030973 is a prime.

It is a super-2 number, since 2×670030981² = 897883030999644722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670030951) 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, 335015490 + 335015491.

It is an arithmetic number, because the mean of its divisors is an integer number (335015491).

Almost surely, 2^670030981 is an apocalyptic number.

It is an amenable number.

670030981 is a deficient number, since it is larger than the sum of its proper divisors (1).

670030981 is an equidigital number, since it uses as much as digits as its factorization.

670030981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 670030981 is about 25884.9566543968. The cubic root of 670030981 is about 875.0474993534.

The spelling of 670030981 in words is "six hundred seventy million, thirty thousand, nine hundred eighty-one".