1693497409 has 2 divisors, whose sum is σ = 1693497410. Its totient is φ = 1693497408.

The previous prime is 1693497353. The next prime is 1693497451. The reversal of 1693497409 is 9047943961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1154096784 + 539400625 = 33972^2 + 23225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1693497409 - 2⁹ = 1693496897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1693497809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 846748704 + 846748705.

It is an arithmetic number, because the mean of its divisors is an integer number (846748705).

Almost surely, 2^1693497409 is an apocalyptic number.

It is an amenable number.

1693497409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1693497409 is an equidigital number, since it uses as much as digits as its factorization.

1693497409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 1693497409 is about 41152.1252063608. The cubic root of 1693497409 is about 1191.9595352182.

The spelling of 1693497409 in words is "one billion, six hundred ninety-three million, four hundred ninety-seven thousand, four hundred nine".