681234765 has 16 divisors (see below), whose sum is σ = 1125136896. Its totient is φ = 351604800.

The previous prime is 681234751. The next prime is 681234773. The reversal of 681234765 is 567432186.

It is not a de Polignac number, because 681234765 - 2⁷ = 681234637 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732046 + ... + 732975.

It is an arithmetic number, because the mean of its divisors is an integer number (70321056).

Almost surely, 2^681234765 is an apocalyptic number.

It is an amenable number.

681234765 is a deficient number, since it is larger than the sum of its proper divisors (443902131).

681234765 is a wasteful number, since it uses less digits than its factorization.

681234765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465060.

The product of its digits is 241920, while the sum is 42.

The square root of 681234765 is about 26100.4744209756. The cubic root of 681234765 is about 879.8978725318.

The spelling of 681234765 in words is "six hundred eighty-one million, two hundred thirty-four thousand, seven hundred sixty-five".