1690742699 has 2 divisors, whose sum is σ = 1690742700. Its totient is φ = 1690742698.

The previous prime is 1690742681. The next prime is 1690742743. The reversal of 1690742699 is 9962470961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1690742699 - 2²⁴ = 1673965483 is a prime.

It is a super-2 number, since 2×1690742699² = 5717221748443609202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1690742699.

It is not a weakly prime, because it can be changed into another prime (1690742299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845371349 + 845371350.

It is an arithmetic number, because the mean of its divisors is an integer number (845371350).

Almost surely, 2^1690742699 is an apocalyptic number.

1690742699 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690742699 is an equidigital number, since it uses as much as digits as its factorization.

1690742699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 1690742699 is about 41118.6417455635. The cubic root of 1690742699 is about 1191.3128882647.

The spelling of 1690742699 in words is "one billion, six hundred ninety million, seven hundred forty-two thousand, six hundred ninety-nine".