683657642 has 4 divisors (see below), whose sum is σ = 1025486466. Its totient is φ = 341828820.

The previous prime is 683657617. The next prime is 683657647. The reversal of 683657642 is 246756386.

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., 434680801 + 248976841 = 20849^2 + 15779^2 .

It is not an unprimeable number, because it can be changed into a prime (683657647) 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, 170914409 + ... + 170914412.

Almost surely, 2^683657642 is an apocalyptic number.

683657642 is a deficient number, since it is larger than the sum of its proper divisors (341828824).

683657642 is a wasteful number, since it uses less digits than its factorization.

683657642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341828823.

The product of its digits is 1451520, while the sum is 47.

The square root of 683657642 is about 26146.8476493821. The cubic root of 683657642 is about 880.9397854385.

The spelling of 683657642 in words is "six hundred eighty-three million, six hundred fifty-seven thousand, six hundred forty-two".