1690000687 has 2 divisors, whose sum is σ = 1690000688. Its totient is φ = 1690000686.

The previous prime is 1690000621. The next prime is 1690000727. The reversal of 1690000687 is 7860000961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1690000687 - 2¹⁵ = 1689967919 is a prime.

It is a super-2 number, since 2×1690000687² = 5712204644120943938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690000387) 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, 845000343 + 845000344.

It is an arithmetic number, because the mean of its divisors is an integer number (845000344).

Almost surely, 2^1690000687 is an apocalyptic number.

1690000687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690000687 is an equidigital number, since it uses as much as digits as its factorization.

1690000687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1690000687 is about 41109.6179378987. The cubic root of 1690000687 is about 1191.1385865992.

The spelling of 1690000687 in words is "one billion, six hundred ninety million, six hundred eighty-seven", and thus it is an aban number.