681131419 has 2 divisors, whose sum is σ = 681131420. Its totient is φ = 681131418.

The previous prime is 681131393. The next prime is 681131441. The reversal of 681131419 is 914131186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681131419 - 2¹⁷ = 681000347 is a prime.

It is a super-2 number, since 2×681131419² = 927880019897907122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (681131489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340565709 + 340565710.

It is an arithmetic number, because the mean of its divisors is an integer number (340565710).

Almost surely, 2^681131419 is an apocalyptic number.

681131419 is a deficient number, since it is larger than the sum of its proper divisors (1).

681131419 is an equidigital number, since it uses as much as digits as its factorization.

681131419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 681131419 is about 26098.4945734424. The cubic root of 681131419 is about 879.8533756227.

The spelling of 681131419 in words is "six hundred eighty-one million, one hundred thirty-one thousand, four hundred nineteen".