681602354 has 8 divisors (see below), whose sum is σ = 1028313900. Its totient is φ = 338831056.

The previous prime is 681602351. The next prime is 681602377. The reversal of 681602354 is 453206186.

It can be written as a sum of positive squares in 2 ways, for example, as 548730625 + 132871729 = 23425^2 + 11527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (681602351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984629 + ... + 985320.

Almost surely, 2^681602354 is an apocalyptic number.

681602354 is a deficient number, since it is larger than the sum of its proper divisors (346711546).

681602354 is a wasteful number, since it uses less digits than its factorization.

681602354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970124.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 681602354 is about 26107.5152781723. The cubic root of 681602354 is about 880.0561060991.

The spelling of 681602354 in words is "six hundred eighty-one million, six hundred two thousand, three hundred fifty-four".