103749109 has 2 divisors, whose sum is σ = 103749110. Its totient is φ = 103749108.

The previous prime is 103749097. The next prime is 103749131. The reversal of 103749109 is 901947301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103734225 + 14884 = 10185^2 + 122^2 .

It is an emirp because it is prime and its reverse (901947301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103749109 - 2²³ = 95360501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103749179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51874554 + 51874555.

It is an arithmetic number, because the mean of its divisors is an integer number (51874555).

Almost surely, 2^103749109 is an apocalyptic number.

It is an amenable number.

103749109 is a deficient number, since it is larger than the sum of its proper divisors (1).

103749109 is an equidigital number, since it uses as much as digits as its factorization.

103749109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 103749109 is about 10185.7306561680. The cubic root of 103749109 is about 469.8884736134. Note that the first 3 decimals are identical.

The spelling of 103749109 in words is "one hundred three million, seven hundred forty-nine thousand, one hundred nine".