103538621 has 2 divisors, whose sum is σ = 103538622. Its totient is φ = 103538620.

The previous prime is 103538593. The next prime is 103538639. The reversal of 103538621 is 126835301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82101721 + 21436900 = 9061^2 + 4630^2 .

It is a cyclic number.

It is not a de Polignac number, because 103538621 - 2⁶ = 103538557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103538641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51769310 + 51769311.

It is an arithmetic number, because the mean of its divisors is an integer number (51769311).

Almost surely, 2^103538621 is an apocalyptic number.

It is an amenable number.

103538621 is a deficient number, since it is larger than the sum of its proper divisors (1).

103538621 is an equidigital number, since it uses as much as digits as its factorization.

103538621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 103538621 is about 10175.3929162465. The cubic root of 103538621 is about 469.5704858292.

The spelling of 103538621 in words is "one hundred three million, five hundred thirty-eight thousand, six hundred twenty-one".