681085141 has 4 divisors (see below), whose sum is σ = 743001984. Its totient is φ = 619168300.

The previous prime is 681085121. The next prime is 681085151. The reversal of 681085141 is 141580186.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 681085141 - 2⁹ = 681084629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 681085097 and 681085106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681085121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30958405 + ... + 30958426.

It is an arithmetic number, because the mean of its divisors is an integer number (185750496).

Almost surely, 2^681085141 is an apocalyptic number.

It is an amenable number.

681085141 is a deficient number, since it is larger than the sum of its proper divisors (61916843).

681085141 is a wasteful number, since it uses less digits than its factorization.

681085141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61916842.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 681085141 is about 26097.6079555196. The cubic root of 681085141 is about 879.8334485936.

The spelling of 681085141 in words is "six hundred eighty-one million, eighty-five thousand, one hundred forty-one".