1649050399 has 2 divisors, whose sum is σ = 1649050400. Its totient is φ = 1649050398.

The previous prime is 1649050379. The next prime is 1649050409. The reversal of 1649050399 is 9930509461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1649050399 - 2¹⁹ = 1648526111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649050309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824525199 + 824525200.

It is an arithmetic number, because the mean of its divisors is an integer number (824525200).

Almost surely, 2^1649050399 is an apocalyptic number.

1649050399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649050399 is an equidigital number, since it uses as much as digits as its factorization.

1649050399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 1649050399 is about 40608.5015606338. The cubic root of 1649050399 is about 1181.4390178794.

The spelling of 1649050399 in words is "one billion, six hundred forty-nine million, fifty thousand, three hundred ninety-nine".