1648263187 has 2 divisors, whose sum is σ = 1648263188. Its totient is φ = 1648263186.

The previous prime is 1648263151. The next prime is 1648263193. The reversal of 1648263187 is 7813628461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1648263187 - 2²⁷ = 1514045459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1648263107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824131593 + 824131594.

It is an arithmetic number, because the mean of its divisors is an integer number (824131594).

Almost surely, 2^1648263187 is an apocalyptic number.

1648263187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648263187 is an equidigital number, since it uses as much as digits as its factorization.

1648263187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 46.

The square root of 1648263187 is about 40598.8077041679. The cubic root of 1648263187 is about 1181.2509922931.

The spelling of 1648263187 in words is "one billion, six hundred forty-eight million, two hundred sixty-three thousand, one hundred eighty-seven".