103640913 has 6 divisors (see below), whose sum is σ = 149703554. Its totient is φ = 69093936.

The previous prime is 103640909. The next prime is 103640939. The reversal of 103640913 is 319046301.

103640913 is a `hidden beast` number, since 1 + 0 + 3 + 640 + 9 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 93547584 + 10093329 = 9672^2 + 3177^2 .

It is not a de Polignac number, because 103640913 - 2² = 103640909 is a prime.

It is a super-3 number, since 3×103640913³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103640903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5757820 + ... + 5757837.

Almost surely, 2^103640913 is an apocalyptic number.

It is an amenable number.

103640913 is a deficient number, since it is larger than the sum of its proper divisors (46062641).

103640913 is a wasteful number, since it uses less digits than its factorization.

103640913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11515663 (or 11515660 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 103640913 is about 10180.4181151856. The cubic root of 103640913 is about 469.7250738597.

The spelling of 103640913 in words is "one hundred three million, six hundred forty thousand, nine hundred thirteen".