1700981 has 2 divisors, whose sum is σ = 1700982. Its totient is φ = 1700980.

The previous prime is 1700921. The next prime is 1700983. The reversal of 1700981 is 1890071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 320356 = 1175^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 1700981 - 2⁶ = 1700917 is a prime.

It is a super-2 number, since 2×1700981² = 5786672724722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1700983, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1700981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1700983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 850490 + 850491.

It is an arithmetic number, because the mean of its divisors is an integer number (850491).

2^1700981 is an apocalyptic number.

It is an amenable number.

1700981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1700981 is an equidigital number, since it uses as much as digits as its factorization.

1700981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1700981 is about 1304.2166231114. The cubic root of 1700981 is about 119.3712717785.

The spelling of 1700981 in words is "one million, seven hundred thousand, nine hundred eighty-one".