1693669849 has 2 divisors, whose sum is σ = 1693669850. Its totient is φ = 1693669848.

The previous prime is 1693669811. The next prime is 1693669921. The reversal of 1693669849 is 9489663961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 987970624 + 705699225 = 31432^2 + 26565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1693669849 - 2²⁷ = 1559452121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1693669249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 846834924 + 846834925.

It is an arithmetic number, because the mean of its divisors is an integer number (846834925).

Almost surely, 2^1693669849 is an apocalyptic number.

It is an amenable number.

1693669849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1693669849 is an equidigital number, since it uses as much as digits as its factorization.

1693669849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15116544, while the sum is 61.

The square root of 1693669849 is about 41154.2203060634. The cubic root of 1693669849 is about 1191.9999908506. Note that the first 5 decimals are identical.

The spelling of 1693669849 in words is "one billion, six hundred ninety-three million, six hundred sixty-nine thousand, eight hundred forty-nine".