939490148521 has 2 divisors, whose sum is σ = 939490148522. Its totient is φ = 939490148520.

The previous prime is 939490148491. The next prime is 939490148581. The reversal of 939490148521 is 125841094939.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 743250894400 + 196239254121 = 862120^2 + 442989^2 .

It is a cyclic number.

It is not a de Polignac number, because 939490148521 - 2⁷ = 939490148393 is a prime.

It is not a weakly prime, because it can be changed into another prime (939490148581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469745074260 + 469745074261.

It is an arithmetic number, because the mean of its divisors is an integer number (469745074261).

Almost surely, 2^939490148521 is an apocalyptic number.

It is an amenable number.

939490148521 is a deficient number, since it is larger than the sum of its proper divisors (1).

939490148521 is an equidigital number, since it uses as much as digits as its factorization.

939490148521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 939490148521 in words is "nine hundred thirty-nine billion, four hundred ninety million, one hundred forty-eight thousand, five hundred twenty-one".