103289661 has 20 divisors (see below), whose sum is σ = 155104092. Its totient is φ = 68499648.

The previous prime is 103289647. The next prime is 103289713. The reversal of 103289661 is 166982301.

It can be written as a sum of positive squares in 2 ways, for example, as 66928761 + 36360900 = 8181^2 + 6030^2 .

It is not a de Polignac number, because 103289661 - 2⁵ = 103289629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103289621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12721 + ... + 19193.

Almost surely, 2^103289661 is an apocalyptic number.

It is an amenable number.

103289661 is a deficient number, since it is larger than the sum of its proper divisors (51814431).

103289661 is an equidigital number, since it uses as much as digits as its factorization.

103289661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6682 (or 6673 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 103289661 is about 10163.1521192984. The cubic root of 103289661 is about 469.1938209297.

The spelling of 103289661 in words is "one hundred three million, two hundred eighty-nine thousand, six hundred sixty-one".