1699235043449 has 2 divisors, whose sum is σ = 1699235043450. Its totient is φ = 1699235043448.

The previous prime is 1699235043409. The next prime is 1699235043497. The reversal of 1699235043449 is 9443405329961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1479855219049 + 219379824400 = 1216493^2 + 468380^2 .

It is an emirp because it is prime and its reverse (9443405329961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1699235043449 - 2²⁴ = 1699218266233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1699235043409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 849617521724 + 849617521725.

It is an arithmetic number, because the mean of its divisors is an integer number (849617521725).

Almost surely, 2^{1699235043449} is an apocalyptic number.

It is an amenable number.

1699235043449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1699235043449 is an equidigital number, since it uses as much as digits as its factorization.

1699235043449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25194240, while the sum is 59.

The spelling of 1699235043449 in words is "one trillion, six hundred ninety-nine billion, two hundred thirty-five million, forty-three thousand, four hundred forty-nine".