681796354 has 4 divisors (see below), whose sum is σ = 1022694534. Its totient is φ = 340898176.

The previous prime is 681796343. The next prime is 681796369. The reversal of 681796354 is 453697186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 643789129 + 38007225 = 25373^2 + 6165^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 681796298 and 681796307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170449087 + ... + 170449090.

Almost surely, 2^681796354 is an apocalyptic number.

681796354 is a deficient number, since it is larger than the sum of its proper divisors (340898180).

681796354 is a wasteful number, since it uses less digits than its factorization.

681796354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340898179.

The product of its digits is 1088640, while the sum is 49.

The square root of 681796354 is about 26111.2304191128. The cubic root of 681796354 is about 880.1395930414.

The spelling of 681796354 in words is "six hundred eighty-one million, seven hundred ninety-six thousand, three hundred fifty-four".