103661819 has 2 divisors, whose sum is σ = 103661820. Its totient is φ = 103661818.

The previous prime is 103661813. The next prime is 103661867. The reversal of 103661819 is 918166301.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103661819 is a prime.

It is a super-2 number, since 2×103661819² = 21491545436777522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_5960078 and since 103661819 and 5960078 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 (103661813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51830909 + 51830910.

It is an arithmetic number, because the mean of its divisors is an integer number (51830910).

Almost surely, 2^103661819 is an apocalyptic number.

103661819 is a deficient number, since it is larger than the sum of its proper divisors (1).

103661819 is an equidigital number, since it uses as much as digits as its factorization.

103661819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 103661819 is about 10181.4448385286. Note that the first 3 decimals coincide. The cubic root of 103661819 is about 469.7566553780.

The spelling of 103661819 in words is "one hundred three million, six hundred sixty-one thousand, eight hundred nineteen".