1648262797 has 2 divisors, whose sum is σ = 1648262798. Its totient is φ = 1648262796.

The previous prime is 1648262687. The next prime is 1648262801. The reversal of 1648262797 is 7972628461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 911194596 + 737068201 = 30186^2 + 27149^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648262797 - 2⁷ = 1648262669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1648263797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824131398 + 824131399.

It is an arithmetic number, because the mean of its divisors is an integer number (824131399).

Almost surely, 2^1648262797 is an apocalyptic number.

It is an amenable number.

1648262797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648262797 is an equidigital number, since it uses as much as digits as its factorization.

1648262797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 1648262797 is about 40598.8029010709. The cubic root of 1648262797 is about 1181.2508991268.

The spelling of 1648262797 in words is "one billion, six hundred forty-eight million, two hundred sixty-two thousand, seven hundred ninety-seven".