681420734 has 16 divisors (see below), whose sum is σ = 1056178176. Its totient is φ = 329383800.

The previous prime is 681420721. The next prime is 681420737. The reversal of 681420734 is 437024186.

It is a junction number, because it is equal to n+sod(n) for n = 681420694 and 681420703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681420737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62339 + ... + 72449.

It is an arithmetic number, because the mean of its divisors is an integer number (66011136).

Almost surely, 2^681420734 is an apocalyptic number.

681420734 is a deficient number, since it is larger than the sum of its proper divisors (374757442).

681420734 is a wasteful number, since it uses less digits than its factorization.

681420734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11231.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 681420734 is about 26104.0367376389. The cubic root of 681420734 is about 879.9779324700.

The spelling of 681420734 in words is "six hundred eighty-one million, four hundred twenty thousand, seven hundred thirty-four".