1238660470849 has 2 divisors, whose sum is σ = 1238660470850. Its totient is φ = 1238660470848.

The previous prime is 1238660470843. The next prime is 1238660470867. The reversal of 1238660470849 is 9480740668321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1179085424449 + 59575046400 = 1085857^2 + 244080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238660470849 - 2¹³ = 1238660462657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1238660470793 and 1238660470802.

It is not a weakly prime, because it can be changed into another prime (1238660470843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619330235424 + 619330235425.

It is an arithmetic number, because the mean of its divisors is an integer number (619330235425).

Almost surely, 2^{1238660470849} is an apocalyptic number.

It is an amenable number.

1238660470849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238660470849 is an equidigital number, since it uses as much as digits as its factorization.

1238660470849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 1238660470849 in words is "one trillion, two hundred thirty-eight billion, six hundred sixty million, four hundred seventy thousand, eight hundred forty-nine".