930031021 has 2 divisors, whose sum is σ = 930031022. Its totient is φ = 930031020.

The previous prime is 930030991. The next prime is 930031027. The reversal of 930031021 is 120130039.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 743162121 + 186868900 = 27261^2 + 13670^2 .

It is an emirp because it is prime and its reverse (120130039) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 930031021 - 2²¹ = 927933869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 930031021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (930031027) 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, 465015510 + 465015511.

It is an arithmetic number, because the mean of its divisors is an integer number (465015511).

Almost surely, 2^930031021 is an apocalyptic number.

It is an amenable number.

930031021 is a deficient number, since it is larger than the sum of its proper divisors (1).

930031021 is an equidigital number, since it uses as much as digits as its factorization.

930031021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 930031021 is about 30496.4099690439. The cubic root of 930031021 is about 976.1108604505.

The spelling of 930031021 in words is "nine hundred thirty million, thirty-one thousand, twenty-one".