103557509 has 4 divisors (see below), whose sum is σ = 112971840. Its totient is φ = 94143180.

The previous prime is 103557481. The next prime is 103557527. The reversal of 103557509 is 905755301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 103557509 - 2⁸ = 103557253 is a prime.

It is a super-3 number, since 3×103557509³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103557589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4707149 + ... + 4707170.

It is an arithmetic number, because the mean of its divisors is an integer number (28242960).

Almost surely, 2^103557509 is an apocalyptic number.

It is an amenable number.

103557509 is a deficient number, since it is larger than the sum of its proper divisors (9414331).

103557509 is an equidigital number, since it uses as much as digits as its factorization.

103557509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9414330.

The product of its (nonzero) digits is 23625, while the sum is 35.

The square root of 103557509 is about 10176.3209953303. The cubic root of 103557509 is about 469.5990378419.

The spelling of 103557509 in words is "one hundred three million, five hundred fifty-seven thousand, five hundred nine".