683919545 has 4 divisors (see below), whose sum is σ = 820703460. Its totient is φ = 547135632.

The previous prime is 683919493. The next prime is 683919659. The reversal of 683919545 is 545919386.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 315701824 + 368217721 = 17768^2 + 19189^2 .

It is a cyclic number.

It is not a de Polignac number, because 683919545 - 2⁸ = 683919289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 683919493 and 683919502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68391950 + ... + 68391959.

It is an arithmetic number, because the mean of its divisors is an integer number (205175865).

Almost surely, 2^683919545 is an apocalyptic number.

It is an amenable number.

683919545 is a deficient number, since it is larger than the sum of its proper divisors (136783915).

683919545 is a wasteful number, since it uses less digits than its factorization.

683919545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136783914.

The product of its digits is 1166400, while the sum is 50.

The square root of 683919545 is about 26151.8554791051. The cubic root of 683919545 is about 881.0522644058.

The spelling of 683919545 in words is "six hundred eighty-three million, nine hundred nineteen thousand, five hundred forty-five".