103393921 has 2 divisors, whose sum is σ = 103393922. Its totient is φ = 103393920.

The previous prime is 103393909. The next prime is 103393943. The reversal of 103393921 is 129393301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103306896 + 87025 = 10164^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 103393921 - 2⁷ = 103393793 is a prime.

It is not a weakly prime, because it can be changed into another prime (103393951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51696960 + 51696961.

It is an arithmetic number, because the mean of its divisors is an integer number (51696961).

Almost surely, 2^103393921 is an apocalyptic number.

It is an amenable number.

103393921 is a deficient number, since it is larger than the sum of its proper divisors (1).

103393921 is an equidigital number, since it uses as much as digits as its factorization.

103393921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 103393921 is about 10168.2801397286. The cubic root of 103393921 is about 469.3516350397.

The spelling of 103393921 in words is "one hundred three million, three hundred ninety-three thousand, nine hundred twenty-one".