681592942 has 4 divisors (see below), whose sum is σ = 1022389416. Its totient is φ = 340796470.

The previous prime is 681592937. The next prime is 681592969. The reversal of 681592942 is 249295186.

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

It is a junction number, because it is equal to n+sod(n) for n = 681592892 and 681592901.

It is a congruent number.

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, 170398234 + ... + 170398237.

It is an arithmetic number, because the mean of its divisors is an integer number (255597354).

Almost surely, 2^681592942 is an apocalyptic number.

681592942 is a deficient number, since it is larger than the sum of its proper divisors (340796474).

681592942 is a wasteful number, since it uses less digits than its factorization.

681592942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340796473.

The product of its digits is 311040, while the sum is 46.

The square root of 681592942 is about 26107.3350229394. The cubic root of 681592942 is about 880.0520552884.

The spelling of 681592942 in words is "six hundred eighty-one million, five hundred ninety-two thousand, nine hundred forty-two".