938135642 has 8 divisors (see below), whose sum is σ = 1408192500. Its totient is φ = 468738144.

The previous prime is 938135623. The next prime is 938135647. The reversal of 938135642 is 246531839.

It is a Cunningham number, because it is equal to 30629²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 938135641 + 1 = 30629^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 938135642.

It is not an unprimeable number, because it can be changed into a prime (938135647) 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 in 3 ways as a sum of consecutive naturals, for example, 161267 + ... + 166982.

Almost surely, 2^938135642 is an apocalyptic number.

938135642 is a deficient number, since it is larger than the sum of its proper divisors (470056858).

938135642 is a wasteful number, since it uses less digits than its factorization.

938135642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329680.

The product of its digits is 155520, while the sum is 41.

The square root of 938135642 is about 30629.0000163244. Note that the first 4 decimals coincide. The cubic root of 938135642 is about 978.9380562569.

The spelling of 938135642 in words is "nine hundred thirty-eight million, one hundred thirty-five thousand, six hundred forty-two".