683661451 has 4 divisors (see below), whose sum is σ = 745812504. Its totient is φ = 621510400.

The previous prime is 683661403. The next prime is 683661487. The reversal of 683661451 is 154166386.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-683661451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (683661551) 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 in 3 ways as a sum of consecutive naturals, for example, 31075510 + ... + 31075531.

It is an arithmetic number, because the mean of its divisors is an integer number (186453126).

Almost surely, 2^683661451 is an apocalyptic number.

683661451 is a deficient number, since it is larger than the sum of its proper divisors (62151053).

683661451 is a wasteful number, since it uses less digits than its factorization.

683661451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62151052.

The product of its digits is 103680, while the sum is 40.

The square root of 683661451 is about 26146.9204878892. The cubic root of 683661451 is about 880.9414214881.

The spelling of 683661451 in words is "six hundred eighty-three million, six hundred sixty-one thousand, four hundred fifty-one".