939021641 has 2 divisors, whose sum is σ = 939021642. Its totient is φ = 939021640.

The previous prime is 939021583. The next prime is 939021689. The reversal of 939021641 is 146120939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614841616 + 324180025 = 24796^2 + 18005^2 .

It is an emirp because it is prime and its reverse (146120939) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 939021641 - 2¹⁴ = 939005257 is a prime.

It is not a weakly prime, because it can be changed into another prime (939021841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469510820 + 469510821.

It is an arithmetic number, because the mean of its divisors is an integer number (469510821).

Almost surely, 2^939021641 is an apocalyptic number.

It is an amenable number.

939021641 is a deficient number, since it is larger than the sum of its proper divisors (1).

939021641 is an equidigital number, since it uses as much as digits as its factorization.

939021641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 939021641 is about 30643.4600037267. The cubic root of 939021641 is about 979.2461372344.

The spelling of 939021641 in words is "nine hundred thirty-nine million, twenty-one thousand, six hundred forty-one".