1690716229 has 2 divisors, whose sum is σ = 1690716230. Its totient is φ = 1690716228.

The previous prime is 1690716193. The next prime is 1690716239. The reversal of 1690716229 is 9226170961.

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., 1686991329 + 3724900 = 41073^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690716229 - 2¹⁷ = 1690585157 is a prime.

It is a super-5 number, since 5×1690716229⁵ (a number of 47 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690716239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845358114 + 845358115.

It is an arithmetic number, because the mean of its divisors is an integer number (845358115).

Almost surely, 2^1690716229 is an apocalyptic number.

It is an amenable number.

1690716229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690716229 is an equidigital number, since it uses as much as digits as its factorization.

1690716229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 1690716229 is about 41118.3198708313. The cubic root of 1690716229 is about 1191.3066712303.

The spelling of 1690716229 in words is "one billion, six hundred ninety million, seven hundred sixteen thousand, two hundred twenty-nine".