103640505 has 16 divisors (see below), whose sum is σ = 166129920. Its totient is φ = 55173248.

The previous prime is 103640503. The next prime is 103640513. The reversal of 103640505 is 505046301.

It is a cyclic number.

It is not a de Polignac number, because 103640505 - 2¹ = 103640503 is a prime.

It is a super-3 number, since 3×103640505³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (103640501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2464 + ... + 14606.

It is an arithmetic number, because the mean of its divisors is an integer number (10383120).

Almost surely, 2^103640505 is an apocalyptic number.

103640505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

103640505 is a deficient number, since it is larger than the sum of its proper divisors (62489415).

103640505 is a wasteful number, since it uses less digits than its factorization.

103640505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 103640505 is about 10180.3980766962. The cubic root of 103640505 is about 469.7244574748.

Adding to 103640505 its reverse (505046301), we get a palindrome (608686806).

The spelling of 103640505 in words is "one hundred three million, six hundred forty thousand, five hundred five".