938661 has 4 divisors (see below), whose sum is σ = 1251552. Its totient is φ = 625772.

The previous prime is 938659. The next prime is 938677. The reversal of 938661 is 166839.

938661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 938661 - 2¹ = 938659 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 938661.

It is not an unprimeable number, because it can be changed into a prime (938611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156441 + ... + 156446.

It is an arithmetic number, because the mean of its divisors is an integer number (312888).

2⁹³⁸⁶⁶¹ is an apocalyptic number.

It is an amenable number.

938661 is a deficient number, since it is larger than the sum of its proper divisors (312891).

938661 is a wasteful number, since it uses less digits than its factorization.

938661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312890.

The product of its digits is 7776, while the sum is 33.

The square root of 938661 is about 968.8451888718. The cubic root of 938661 is about 97.9120757970.

The spelling of 938661 in words is "nine hundred thirty-eight thousand, six hundred sixty-one".