681486719 has 2 divisors, whose sum is σ = 681486720. Its totient is φ = 681486718.

The previous prime is 681486703. The next prime is 681486731. The reversal of 681486719 is 917684186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681486719 - 2⁴ = 681486703 is a prime.

It is a super-2 number, since 2×681486719² = 928848296346769922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681486779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340743359 + 340743360.

It is an arithmetic number, because the mean of its divisors is an integer number (340743360).

Almost surely, 2^681486719 is an apocalyptic number.

681486719 is a deficient number, since it is larger than the sum of its proper divisors (1).

681486719 is an equidigital number, since it uses as much as digits as its factorization.

681486719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 681486719 is about 26105.3005920254. The cubic root of 681486719 is about 880.0063356121.

The spelling of 681486719 in words is "six hundred eighty-one million, four hundred eighty-six thousand, seven hundred nineteen".