681695341 has 2 divisors, whose sum is σ = 681695342. Its totient is φ = 681695340.

The previous prime is 681695317. The next prime is 681695369. The reversal of 681695341 is 143596186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657153225 + 24542116 = 25635^2 + 4954^2 .

It is a cyclic number.

It is not a de Polignac number, because 681695341 - 2⁵ = 681695309 is a prime.

It is a super-2 number, since 2×681695341² = 929417075882212562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681695941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340847670 + 340847671.

It is an arithmetic number, because the mean of its divisors is an integer number (340847671).

Almost surely, 2^681695341 is an apocalyptic number.

It is an amenable number.

681695341 is a deficient number, since it is larger than the sum of its proper divisors (1).

681695341 is an equidigital number, since it uses as much as digits as its factorization.

681695341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 681695341 is about 26109.2960648119. The cubic root of 681695341 is about 880.0961245720.

The spelling of 681695341 in words is "six hundred eighty-one million, six hundred ninety-five thousand, three hundred forty-one".