103319921 has 2 divisors, whose sum is σ = 103319922. Its totient is φ = 103319920.

The previous prime is 103319917. The next prime is 103319969. The reversal of 103319921 is 129913301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63377521 + 39942400 = 7961^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 103319921 - 2² = 103319917 is a prime.

It is not a weakly prime, because it can be changed into another prime (103319971) 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, 51659960 + 51659961.

It is an arithmetic number, because the mean of its divisors is an integer number (51659961).

Almost surely, 2^103319921 is an apocalyptic number.

It is an amenable number.

103319921 is a deficient number, since it is larger than the sum of its proper divisors (1).

103319921 is an equidigital number, since it uses as much as digits as its factorization.

103319921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 103319921 is about 10164.6407216389. The cubic root of 103319921 is about 469.2396351917.

The spelling of 103319921 in words is "one hundred three million, three hundred nineteen thousand, nine hundred twenty-one".