1649332393 has 2 divisors, whose sum is σ = 1649332394. Its totient is φ = 1649332392.

The previous prime is 1649332361. The next prime is 1649332441. The reversal of 1649332393 is 3932339461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1626750889 + 22581504 = 40333^2 + 4752^2 .

It is a cyclic number.

It is not a de Polignac number, because 1649332393 - 2⁵ = 1649332361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1649332193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824666196 + 824666197.

It is an arithmetic number, because the mean of its divisors is an integer number (824666197).

Almost surely, 2^1649332393 is an apocalyptic number.

It is an amenable number.

1649332393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649332393 is an equidigital number, since it uses as much as digits as its factorization.

1649332393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 43.

The square root of 1649332393 is about 40611.9735176709. The cubic root of 1649332393 is about 1181.5063575891.

The spelling of 1649332393 in words is "one billion, six hundred forty-nine million, three hundred thirty-two thousand, three hundred ninety-three".