681719603 has 2 divisors, whose sum is σ = 681719604. Its totient is φ = 681719602.

The previous prime is 681719557. The next prime is 681719629. The reversal of 681719603 is 306917186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681719603 - 2¹⁴ = 681703219 is a prime.

It is a super-2 number, since 2×681719603² = 929483234228955218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (681719653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340859801 + 340859802.

It is an arithmetic number, because the mean of its divisors is an integer number (340859802).

Almost surely, 2^681719603 is an apocalyptic number.

681719603 is a deficient number, since it is larger than the sum of its proper divisors (1).

681719603 is an equidigital number, since it uses as much as digits as its factorization.

681719603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 681719603 is about 26109.7606844643. The cubic root of 681719603 is about 880.1065655210.

The spelling of 681719603 in words is "six hundred eighty-one million, seven hundred nineteen thousand, six hundred three".