703981 has 2 divisors, whose sum is σ = 703982. Its totient is φ = 703980.

The previous prime is 703957. The next prime is 703991. The reversal of 703981 is 189307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570025 + 133956 = 755^2 + 366^2 .

It is an emirp because it is prime and its reverse (189307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 703981 - 2⁵ = 703949 is a prime.

It is a super-2 number, since 2×703981² = 991178496722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (703991) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351990 + 351991.

It is an arithmetic number, because the mean of its divisors is an integer number (351991).

2⁷⁰³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

703981 is a deficient number, since it is larger than the sum of its proper divisors (1).

703981 is an equidigital number, since it uses as much as digits as its factorization.

703981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 703981 is about 839.0357560915. The cubic root of 703981 is about 88.9584033197.

The spelling of 703981 in words is "seven hundred three thousand, nine hundred eighty-one".