103739509 has 2 divisors, whose sum is σ = 103739510. Its totient is φ = 103739508.

The previous prime is 103739507. The next prime is 103739533. The reversal of 103739509 is 905937301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103083409 + 656100 = 10153^2 + 810^2 .

It is an emirp because it is prime and its reverse (905937301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103739509 - 2¹ = 103739507 is a prime.

It is a super-2 number, since 2×103739509² = 21523771455122162, which contains 22 as substring.

Together with 103739507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103739507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51869754 + 51869755.

It is an arithmetic number, because the mean of its divisors is an integer number (51869755).

Almost surely, 2^103739509 is an apocalyptic number.

It is an amenable number.

103739509 is a deficient number, since it is larger than the sum of its proper divisors (1).

103739509 is an equidigital number, since it uses as much as digits as its factorization.

103739509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 103739509 is about 10185.2593977768. The cubic root of 103739509 is about 469.8739800962.

The spelling of 103739509 in words is "one hundred three million, seven hundred thirty-nine thousand, five hundred nine".