103408561 has 3 divisors (see below), whose sum is σ = 103418731. Its totient is φ = 103398392.

The previous prime is 103408549. The next prime is 103408579. The reversal of 103408561 is 165804301.

The square root of 103408561 is 10169.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 165804301 = 13 ⋅12754177.

It can be written as a sum of positive squares in only one way, i.e., 96648561 + 6760000 = 9831^2 + 2600^2 .

It is not a de Polignac number, because 103408561 - 2¹³ = 103400369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103408531) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5085 + ... + 15253.

Almost surely, 2^103408561 is an apocalyptic number.

103408561 is the 10169-th square number.

103408561 is the 5085-th centered octagonal number.

It is an amenable number.

103408561 is a deficient number, since it is larger than the sum of its proper divisors (10170).

103408561 is an frugal number, since it uses more digits than its factorization.

103408561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20338 (or 10169 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The cubic root of 103408561 is about 469.3737865150.

The spelling of 103408561 in words is "one hundred three million, four hundred eight thousand, five hundred sixty-one".