1030319921 has 2 divisors, whose sum is σ = 1030319922. Its totient is φ = 1030319920.

The previous prime is 1030319911. The next prime is 1030319959. The reversal of 1030319921 is 1299130301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714760225 + 315559696 = 26735^2 + 17764^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030319921 - 2²⁶ = 963211057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1030319911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515159960 + 515159961.

It is an arithmetic number, because the mean of its divisors is an integer number (515159961).

Almost surely, 2^1030319921 is an apocalyptic number.

It is an amenable number.

1030319921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1030319921 is an equidigital number, since it uses as much as digits as its factorization.

1030319921 is an evil number, because the sum of its binary digits is even.

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

The square root of 1030319921 is about 32098.5968696453. The cubic root of 1030319921 is about 1010.0061826893.

The spelling of 1030319921 in words is "one billion, thirty million, three hundred nineteen thousand, nine hundred twenty-one".