2238778169 has 2 divisors, whose sum is σ = 2238778170. Its totient is φ = 2238778168.

The previous prime is 2238778111. The next prime is 2238778183. The reversal of 2238778169 is 9618778322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1777044025 + 461734144 = 42155^2 + 21488^2 .

It is a cyclic number.

It is not a de Polignac number, because 2238778169 - 2⁸ = 2238777913 is a prime.

It is a super-2 number, since 2×2238778169² = 10024255379981985122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2238778169.

It is not a weakly prime, because it can be changed into another prime (2238778109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119389084 + 1119389085.

It is an arithmetic number, because the mean of its divisors is an integer number (1119389085).

Almost surely, 2^2238778169 is an apocalyptic number.

It is an amenable number.

2238778169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2238778169 is an equidigital number, since it uses as much as digits as its factorization.

2238778169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 53.

The square root of 2238778169 is about 47315.7285582712. The cubic root of 2238778169 is about 1308.1885825802.

The spelling of 2238778169 in words is "two billion, two hundred thirty-eight million, seven hundred seventy-eight thousand, one hundred sixty-nine".