681487094 has 4 divisors (see below), whose sum is σ = 1022230644. Its totient is φ = 340743546.

The previous prime is 681487073. The next prime is 681487099. The reversal of 681487094 is 490784186.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681487099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170371772 + ... + 170371775.

It is an arithmetic number, because the mean of its divisors is an integer number (255557661).

Almost surely, 2^681487094 is an apocalyptic number.

681487094 is a deficient number, since it is larger than the sum of its proper divisors (340743550).

681487094 is a wasteful number, since it uses less digits than its factorization.

681487094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340743549.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 681487094 is about 26105.3077744738. The cubic root of 681487094 is about 880.0064970250.

The spelling of 681487094 in words is "six hundred eighty-one million, four hundred eighty-seven thousand, ninety-four".