103638109 has 2 divisors, whose sum is σ = 103638110. Its totient is φ = 103638108.

The previous prime is 103638091. The next prime is 103638113. The reversal of 103638109 is 901836301.

Together with previous prime (103638091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95355225 + 8282884 = 9765^2 + 2878^2 .

It is a cyclic number.

It is not a de Polignac number, because 103638109 - 2¹⁷ = 103507037 is a prime.

It is a super-3 number, since 3×103638109³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103638169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51819054 + 51819055.

It is an arithmetic number, because the mean of its divisors is an integer number (51819055).

Almost surely, 2^103638109 is an apocalyptic number.

It is an amenable number.

103638109 is a deficient number, since it is larger than the sum of its proper divisors (1).

103638109 is an equidigital number, since it uses as much as digits as its factorization.

103638109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 103638109 is about 10180.2803988888. The cubic root of 103638109 is about 469.7208376916.

The spelling of 103638109 in words is "one hundred three million, six hundred thirty-eight thousand, one hundred nine".