1649069269 has 2 divisors, whose sum is σ = 1649069270. Its totient is φ = 1649069268.

The previous prime is 1649069231. The next prime is 1649069281. The reversal of 1649069269 is 9629609461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1384584100 + 264485169 = 37210^2 + 16263^2 .

It is an emirp because it is prime and its reverse (9629609461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1649069269 - 2⁷ = 1649069141 is a prime.

It is a super-2 number, since 2×1649069269² = 5438858907920388722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649069069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824534634 + 824534635.

It is an arithmetic number, because the mean of its divisors is an integer number (824534635).

Almost surely, 2^1649069269 is an apocalyptic number.

It is an amenable number.

1649069269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649069269 is an equidigital number, since it uses as much as digits as its factorization.

1649069269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 1649069269 is about 40608.7339004801. The cubic root of 1649069269 is about 1181.4435242444.

The spelling of 1649069269 in words is "one billion, six hundred forty-nine million, sixty-nine thousand, two hundred sixty-nine".