1690742743 has 2 divisors, whose sum is σ = 1690742744. Its totient is φ = 1690742742.

The previous prime is 1690742699. The next prime is 1690742749. The reversal of 1690742743 is 3472470961.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1690742743 is a prime.

It is a super-2 number, since 2×1690742743² = 5717222046014328098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1690742743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690742749) 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, 845371371 + 845371372.

It is an arithmetic number, because the mean of its divisors is an integer number (845371372).

Almost surely, 2^1690742743 is an apocalyptic number.

1690742743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690742743 is an equidigital number, since it uses as much as digits as its factorization.

1690742743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 1690742743 is about 41118.6422806007. The cubic root of 1690742743 is about 1191.3128985990.

The spelling of 1690742743 in words is "one billion, six hundred ninety million, seven hundred forty-two thousand, seven hundred forty-three".