713281981 has 2 divisors, whose sum is σ = 713281982. Its totient is φ = 713281980.

The previous prime is 713281951. The next prime is 713282071. The reversal of 713281981 is 189182317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656896900 + 56385081 = 25630^2 + 7509^2 .

It is a cyclic number.

It is not a de Polignac number, because 713281981 - 2⁵ = 713281949 is a prime.

It is a super-2 number, since 2×713281981² = 1017542368838568722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (713281931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356640990 + 356640991.

It is an arithmetic number, because the mean of its divisors is an integer number (356640991).

Almost surely, 2^713281981 is an apocalyptic number.

It is an amenable number.

713281981 is a deficient number, since it is larger than the sum of its proper divisors (1).

713281981 is an equidigital number, since it uses as much as digits as its factorization.

713281981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 40.

The square root of 713281981 is about 26707.3394594070. The cubic root of 713281981 is about 893.4846264730.

The spelling of 713281981 in words is "seven hundred thirteen million, two hundred eighty-one thousand, nine hundred eighty-one".