1208117819 has 2 divisors, whose sum is σ = 1208117820. Its totient is φ = 1208117818.

The previous prime is 1208117791. The next prime is 1208117837. The reversal of 1208117819 is 9187118021.

It is a strong prime.

It is an emirp because it is prime and its reverse (9187118021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1208117819 - 2²⁸ = 939682363 is a prime.

It is a super-2 number, since 2×1208117819² = 2919097329170633522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1208117219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604058909 + 604058910.

It is an arithmetic number, because the mean of its divisors is an integer number (604058910).

Almost surely, 2^1208117819 is an apocalyptic number.

1208117819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208117819 is an equidigital number, since it uses as much as digits as its factorization.

1208117819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 38.

The square root of 1208117819 is about 34757.9892830411. The cubic root of 1208117819 is about 1065.0494276398.

The spelling of 1208117819 in words is "one billion, two hundred eight million, one hundred seventeen thousand, eight hundred nineteen".