671030881 has 2 divisors, whose sum is σ = 671030882. Its totient is φ = 671030880.

The previous prime is 671030879. The next prime is 671030903. The reversal of 671030881 is 188030176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655820881 + 15210000 = 25609^2 + 3900^2 .

It is a cyclic number.

It is not a de Polignac number, because 671030881 - 2¹ = 671030879 is a prime.

It is a super-2 number, since 2×671030881² = 900564886511272322, which contains 22 as substring.

Together with 671030879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (671030821) 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, 335515440 + 335515441.

It is an arithmetic number, because the mean of its divisors is an integer number (335515441).

Almost surely, 2^671030881 is an apocalyptic number.

It is an amenable number.

671030881 is a deficient number, since it is larger than the sum of its proper divisors (1).

671030881 is an equidigital number, since it uses as much as digits as its factorization.

671030881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 671030881 is about 25904.2637610105. The cubic root of 671030881 is about 875.4825663578.

The spelling of 671030881 in words is "six hundred seventy-one million, thirty thousand, eight hundred eighty-one".