681702148 has 12 divisors (see below), whose sum is σ = 1201562320. Its totient is φ = 338398632.

The previous prime is 681702137. The next prime is 681702167. The reversal of 681702148 is 841207186.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612486 + ... + 613597.

Almost surely, 2^681702148 is an apocalyptic number.

It is an amenable number.

681702148 is a deficient number, since it is larger than the sum of its proper divisors (519860172).

681702148 is a wasteful number, since it uses less digits than its factorization.

681702148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226226 (or 1226224 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 681702148 is about 26109.4264203563. The cubic root of 681702148 is about 880.0990539326.

The spelling of 681702148 in words is "six hundred eighty-one million, seven hundred two thousand, one hundred forty-eight".