681070132 has 6 divisors (see below), whose sum is σ = 1191872738. Its totient is φ = 340535064.

The previous prime is 681070129. The next prime is 681070141. The reversal of 681070132 is 231070186.

It can be written as a sum of positive squares in only one way, i.e., 608411556 + 72658576 = 24666^2 + 8524^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 681070132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85133763 + ... + 85133770.

Almost surely, 2^681070132 is an apocalyptic number.

It is an amenable number.

681070132 is a deficient number, since it is larger than the sum of its proper divisors (510802606).

681070132 is a wasteful number, since it uses less digits than its factorization.

681070132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170267537 (or 170267535 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 681070132 is about 26097.3203988455. The cubic root of 681070132 is about 879.8269856144.

The spelling of 681070132 in words is "six hundred eighty-one million, seventy thousand, one hundred thirty-two".