2118377 has 2 divisors, whose sum is σ = 2118378. Its totient is φ = 2118376.

The previous prime is 2118371. The next prime is 2118397. The reversal of 2118377 is 7738112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2027776 + 90601 = 1424^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 2118377 - 2⁶ = 2118313 is a prime.

It is a super-2 number, since 2×2118377² = 8975042228258, which contains 22 as substring.

It is a Chen prime.

It is equal to p₁₅₇₀₈₈ and since 2118377 and 157088 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2118371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059188 + 1059189.

It is an arithmetic number, because the mean of its divisors is an integer number (1059189).

2^2118377 is an apocalyptic number.

It is an amenable number.

2118377 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118377 is an equidigital number, since it uses as much as digits as its factorization.

2118377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 29.

The square root of 2118377 is about 1455.4645306568. The cubic root of 2118377 is about 128.4303750564.

The spelling of 2118377 in words is "two million, one hundred eighteen thousand, three hundred seventy-seven".