935139021 has 4 divisors (see below), whose sum is σ = 1246852032. Its totient is φ = 623426012.

The previous prime is 935139011. The next prime is 935139047. The reversal of 935139021 is 120931539.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 935139021 - 2⁵ = 935138989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (935139001) 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 in 3 ways as a sum of consecutive naturals, for example, 155856501 + ... + 155856506.

It is an arithmetic number, because the mean of its divisors is an integer number (311713008).

Almost surely, 2^935139021 is an apocalyptic number.

It is an amenable number.

935139021 is a deficient number, since it is larger than the sum of its proper divisors (311713011).

935139021 is a wasteful number, since it uses less digits than its factorization.

935139021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311713010.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 935139021 is about 30580.0428547770. The cubic root of 935139021 is about 977.8946267174.

The spelling of 935139021 in words is "nine hundred thirty-five million, one hundred thirty-nine thousand, twenty-one".