642063393 has 12 divisors (see below), whose sum is σ = 959405460. Its totient is φ = 413282016.

The previous prime is 642063391. The next prime is 642063427. The reversal of 642063393 is 393360246.

642063393 is a `hidden beast` number, since 64 + 206 + 3 + 393 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 163635264 + 478428129 = 12792^2 + 21873^2 .

It is not a de Polignac number, because 642063393 - 2¹ = 642063391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642063391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1229746 + ... + 1230267.

It is an arithmetic number, because the mean of its divisors is an integer number (79950455).

Almost surely, 2^642063393 is an apocalyptic number.

It is an amenable number.

642063393 is a deficient number, since it is larger than the sum of its proper divisors (317342067).

642063393 is a wasteful number, since it uses less digits than its factorization.

642063393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460048 (or 2460045 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

The square root of 642063393 is about 25338.9698488317. The cubic root of 642063393 is about 862.6990169604.

The spelling of 642063393 in words is "six hundred forty-two million, sixty-three thousand, three hundred ninety-three".