716443781 has 2 divisors, whose sum is σ = 716443782. Its totient is φ = 716443780.

The previous prime is 716443727. The next prime is 716443789. The reversal of 716443781 is 187344617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 644702881 + 71740900 = 25391^2 + 8470^2 .

It is a cyclic number.

It is not a de Polignac number, because 716443781 - 2¹⁰ = 716442757 is a prime.

It is a super-2 number, since 2×716443781² = 1026583382667151922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (716443789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358221890 + 358221891.

It is an arithmetic number, because the mean of its divisors is an integer number (358221891).

Almost surely, 2^716443781 is an apocalyptic number.

It is an amenable number.

716443781 is a deficient number, since it is larger than the sum of its proper divisors (1).

716443781 is an equidigital number, since it uses as much as digits as its factorization.

716443781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 41.

The square root of 716443781 is about 26766.4674733144. The cubic root of 716443781 is about 894.8028782608.

The spelling of 716443781 in words is "seven hundred sixteen million, four hundred forty-three thousand, seven hundred eighty-one".