681123463 has 2 divisors, whose sum is σ = 681123464. Its totient is φ = 681123462.

The previous prime is 681123431. The next prime is 681123473. The reversal of 681123463 is 364321186.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681123463 - 2⁵ = 681123431 is a prime.

It is a super-2 number, since 2×681123463² = 927858343698224738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681123473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340561731 + 340561732.

It is an arithmetic number, because the mean of its divisors is an integer number (340561732).

Almost surely, 2^681123463 is an apocalyptic number.

681123463 is a deficient number, since it is larger than the sum of its proper divisors (1).

681123463 is an equidigital number, since it uses as much as digits as its factorization.

681123463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 681123463 is about 26098.3421504125. The cubic root of 681123463 is about 879.8499498811.

The spelling of 681123463 in words is "six hundred eighty-one million, one hundred twenty-three thousand, four hundred sixty-three".