1690930369 has 2 divisors, whose sum is σ = 1690930370. Its totient is φ = 1690930368.

The previous prime is 1690930361. The next prime is 1690930379. The reversal of 1690930369 is 9630390961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 980441344 + 710489025 = 31312^2 + 26655^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690930369 - 2³ = 1690930361 is a prime.

It is a super-2 number, since 2×1690930369² = 5718491025612952322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1690930361) 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, 845465184 + 845465185.

It is an arithmetic number, because the mean of its divisors is an integer number (845465185).

Almost surely, 2^1690930369 is an apocalyptic number.

It is an amenable number.

1690930369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690930369 is an equidigital number, since it uses as much as digits as its factorization.

1690930369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 1690930369 is about 41120.9237371925. The cubic root of 1690930369 is about 1191.3569646379.

It can be divided in two parts, 16909 and 30369, that added together give a triangular number (47278 = T₃₀₇).

The spelling of 1690930369 in words is "one billion, six hundred ninety million, nine hundred thirty thousand, three hundred sixty-nine".