1238005650187 has 2 divisors, whose sum is σ = 1238005650188. Its totient is φ = 1238005650186.

The previous prime is 1238005650151. The next prime is 1238005650227. The reversal of 1238005650187 is 7810565008321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1238005650187 - 2¹⁵ = 1238005617419 is a prime.

It is a super-2 number, since 2×1238005650187² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1238005651187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619002825093 + 619002825094.

It is an arithmetic number, because the mean of its divisors is an integer number (619002825094).

Almost surely, 2^{1238005650187} is an apocalyptic number.

1238005650187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238005650187 is an equidigital number, since it uses as much as digits as its factorization.

1238005650187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 1238005650187 in words is "one trillion, two hundred thirty-eight billion, five million, six hundred fifty thousand, one hundred eighty-seven".