681436003 has 2 divisors, whose sum is σ = 681436004. Its totient is φ = 681436002.

The previous prime is 681435977. The next prime is 681436009. The reversal of 681436003 is 300634186.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681436003 is a prime.

It is not a weakly prime, because it can be changed into another prime (681436009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340718001 + 340718002.

It is an arithmetic number, because the mean of its divisors is an integer number (340718002).

Almost surely, 2^681436003 is an apocalyptic number.

681436003 is a deficient number, since it is larger than the sum of its proper divisors (1).

681436003 is an equidigital number, since it uses as much as digits as its factorization.

681436003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 681436003 is about 26104.3292003453. The cubic root of 681436003 is about 879.9845051507.

The spelling of 681436003 in words is "six hundred eighty-one million, four hundred thirty-six thousand, three".