103639645 has 16 divisors (see below), whose sum is σ = 127872432. Its totient is φ = 80604160.

The previous prime is 103639643. The next prime is 103639673. The reversal of 103639645 is 546936301.

It can be written as a sum of positive squares in 8 ways, for example, as 19201924 + 84437721 = 4382^2 + 9189^2 .

It is not a de Polignac number, because 103639645 - 2¹ = 103639643 is a prime.

It is a super-3 number, since 3×103639645³ (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 (103639643) 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, 28215 + ... + 31675.

It is an arithmetic number, because the mean of its divisors is an integer number (7992027).

Almost surely, 2^103639645 is an apocalyptic number.

It is an amenable number.

103639645 is a deficient number, since it is larger than the sum of its proper divisors (24232787).

103639645 is a wasteful number, since it uses less digits than its factorization.

103639645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 103639645 is about 10180.3558385746. The cubic root of 103639645 is about 469.7231582268.

The spelling of 103639645 in words is "one hundred three million, six hundred thirty-nine thousand, six hundred forty-five".