1648530397 has 2 divisors, whose sum is σ = 1648530398. Its totient is φ = 1648530396.

The previous prime is 1648530371. The next prime is 1648530407. The reversal of 1648530397 is 7930358461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1578155076 + 70375321 = 39726^2 + 8389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648530397 - 2²⁷ = 1514312669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1648530097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824265198 + 824265199.

It is an arithmetic number, because the mean of its divisors is an integer number (824265199).

Almost surely, 2^1648530397 is an apocalyptic number.

It is an amenable number.

1648530397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648530397 is an equidigital number, since it uses as much as digits as its factorization.

1648530397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 1648530397 is about 40602.0984309925. The cubic root of 1648530397 is about 1181.3148221121.

The spelling of 1648530397 in words is "one billion, six hundred forty-eight million, five hundred thirty thousand, three hundred ninety-seven".