1649069231 has 2 divisors, whose sum is σ = 1649069232. Its totient is φ = 1649069230.

The previous prime is 1649069179. The next prime is 1649069269. The reversal of 1649069231 is 1329609461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1649069231 - 2³⁰ = 575327407 is a prime.

It is a super-2 number, since 2×1649069231² = 5438858657261862722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649069281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824534615 + 824534616.

It is an arithmetic number, because the mean of its divisors is an integer number (824534616).

Almost surely, 2^1649069231 is an apocalyptic number.

1649069231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649069231 is an equidigital number, since it uses as much as digits as its factorization.

1649069231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1649069231 is about 40608.7334326004. The cubic root of 1649069231 is about 1181.4435151696.

The spelling of 1649069231 in words is "one billion, six hundred forty-nine million, sixty-nine thousand, two hundred thirty-one".