1671006989 has 2 divisors, whose sum is σ = 1671006990. Its totient is φ = 1671006988.

The previous prime is 1671006917. The next prime is 1671007021. The reversal of 1671006989 is 9896001761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1301982889 + 369024100 = 36083^2 + 19210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1671006989 is a prime.

It is a super-2 number, since 2×1671006989² = 5584528714573692242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671006089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835503494 + 835503495.

It is an arithmetic number, because the mean of its divisors is an integer number (835503495).

Almost surely, 2^1671006989 is an apocalyptic number.

It is an amenable number.

1671006989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671006989 is an equidigital number, since it uses as much as digits as its factorization.

1671006989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 1671006989 is about 40877.9523582089. The cubic root of 1671006989 is about 1186.6594136012.

The spelling of 1671006989 in words is "one billion, six hundred seventy-one million, six thousand, nine hundred eighty-nine".