1691683429 has 2 divisors, whose sum is σ = 1691683430. Its totient is φ = 1691683428.

The previous prime is 1691683421. The next prime is 1691683453. The reversal of 1691683429 is 9243861961.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1656897025 + 34786404 = 40705^2 + 5898^2 .

It is a cyclic number.

It is not a de Polignac number, because 1691683429 - 2³ = 1691683421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1691683421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845841714 + 845841715.

It is an arithmetic number, because the mean of its divisors is an integer number (845841715).

Almost surely, 2^1691683429 is an apocalyptic number.

It is an amenable number.

1691683429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691683429 is an equidigital number, since it uses as much as digits as its factorization.

1691683429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 1691683429 is about 41130.0793702127. The cubic root of 1691683429 is about 1191.5337963081.

The spelling of 1691683429 in words is "one billion, six hundred ninety-one million, six hundred eighty-three thousand, four hundred twenty-nine".