681701707 has 2 divisors, whose sum is σ = 681701708. Its totient is φ = 681701706.

The previous prime is 681701681. The next prime is 681701719. The reversal of 681701707 is 707107186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681701707 - 2¹¹ = 681699659 is a prime.

It is not a weakly prime, because it can be changed into another prime (681711707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340850853 + 340850854.

It is an arithmetic number, because the mean of its divisors is an integer number (340850854).

Almost surely, 2^681701707 is an apocalyptic number.

681701707 is a deficient number, since it is larger than the sum of its proper divisors (1).

681701707 is an equidigital number, since it uses as much as digits as its factorization.

681701707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16464, while the sum is 37.

The square root of 681701707 is about 26109.4179751292. The cubic root of 681701707 is about 880.0988641509.

The spelling of 681701707 in words is "six hundred eighty-one million, seven hundred one thousand, seven hundred seven".