1690607069 has 2 divisors, whose sum is σ = 1690607070. Its totient is φ = 1690607068.

The previous prime is 1690607033. The next prime is 1690607077. The reversal of 1690607069 is 9607060961.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1649172100 + 41434969 = 40610^2 + 6437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1690607069 is a prime.

It is a super-2 number, since 2×1690607069² = 5716304523505541522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690607089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845303534 + 845303535.

It is an arithmetic number, because the mean of its divisors is an integer number (845303535).

Almost surely, 2^1690607069 is an apocalyptic number.

It is an amenable number.

1690607069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690607069 is an equidigital number, since it uses as much as digits as its factorization.

1690607069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 1690607069 is about 41116.9924605387. The cubic root of 1690607069 is about 1191.2810320302.

The spelling of 1690607069 in words is "one billion, six hundred ninety million, six hundred seven thousand, sixty-nine".