106503509 has 12 divisors (see below), whose sum is σ = 124061184. Its totient is φ = 91164024.

The previous prime is 106503497. The next prime is 106503511. The reversal of 106503509 is 905305601.

It is a de Polignac number, because none of the positive numbers 2^k-106503509 is a prime.

It is a super-2 number, since 2×106503509² = 22685994858626162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106503539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63212 + ... + 64874.

It is an arithmetic number, because the mean of its divisors is an integer number (10338432).

Almost surely, 2^106503509 is an apocalyptic number.

It is an amenable number.

106503509 is a deficient number, since it is larger than the sum of its proper divisors (17557675).

106503509 is a wasteful number, since it uses less digits than its factorization.

106503509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984 (or 2977 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 106503509 is about 10320.0537304803. The cubic root of 106503509 is about 474.0105111997.

The spelling of 106503509 in words is "one hundred six million, five hundred three thousand, five hundred nine".