938135641 has 9 divisors (see below), whose sum is σ = 950202813. Its totient is φ = 926220960.

The previous prime is 938135623. The next prime is 938135647. The reversal of 938135641 is 146531839.

The square root of 938135641 is 30629.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 130439241 + 807696400 = 11421^2 + 28420^2 .

It is not a de Polignac number, because 938135641 - 2¹⁷ = 938004569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 938135594 and 938135603.

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 8 ways as a sum of consecutive naturals, for example, 3338421 + ... + 3338701.

Almost surely, 2^938135641 is an apocalyptic number.

938135641 is the 30629-th square number.

938135641 is the 15315-th centered octagonal number.

It is an amenable number.

938135641 is a deficient number, since it is larger than the sum of its proper divisors (12067172).

938135641 is an frugal number, since it uses more digits than its factorization.

938135641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 390 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The cubic root of 938135641 is about 978.9380559091.

The spelling of 938135641 in words is "nine hundred thirty-eight million, one hundred thirty-five thousand, six hundred forty-one".