1676981 has 2 divisors, whose sum is σ = 1676982. Its totient is φ = 1676980.

The previous prime is 1676971. The next prime is 1676993. The reversal of 1676981 is 1896761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1540081 + 136900 = 1241^2 + 370^2 .

It is an emirp because it is prime and its reverse (1896761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1676981 - 2¹⁸ = 1414837 is a prime.

It is a super-2 number, since 2×1676981² = 5624530548722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1676911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838490 + 838491.

It is an arithmetic number, because the mean of its divisors is an integer number (838491).

2^1676981 is an apocalyptic number.

It is an amenable number.

1676981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1676981 is an equidigital number, since it uses as much as digits as its factorization.

1676981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 1676981 is about 1294.9830114716. The cubic root of 1676981 is about 118.8071872293.

The spelling of 1676981 in words is "one million, six hundred seventy-six thousand, nine hundred eighty-one".