1684893845 has 16 divisors (see below), whose sum is σ = 2046049200. Its totient is φ = 1331871744.

The previous prime is 1684893841. The next prime is 1684893907. The reversal of 1684893845 is 5483984861.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1012321489 + 672572356 = 31817^2 + 25934^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684893845 - 2² = 1684893841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684893841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185981 + ... + 194829.

It is an arithmetic number, because the mean of its divisors is an integer number (127878075).

Almost surely, 2^1684893845 is an apocalyptic number.

It is an amenable number.

1684893845 is a deficient number, since it is larger than the sum of its proper divisors (361155355).

1684893845 is a wasteful number, since it uses less digits than its factorization.

1684893845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9304.

The product of its digits is 6635520, while the sum is 56.

The square root of 1684893845 is about 41047.4584475093. The cubic root of 1684893845 is about 1189.9375823486.

The spelling of 1684893845 in words is "one billion, six hundred eighty-four million, eight hundred ninety-three thousand, eight hundred forty-five".