931641 has 4 divisors (see below), whose sum is σ = 1242192. Its totient is φ = 621092.

The previous prime is 931639. The next prime is 931657. The reversal of 931641 is 146139.

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 931641 - 2¹ = 931639 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (931621) 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, 155271 + ... + 155276.

It is an arithmetic number, because the mean of its divisors is an integer number (310548).

2⁹³¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

931641 is a deficient number, since it is larger than the sum of its proper divisors (310551).

931641 is a wasteful number, since it uses less digits than its factorization.

931641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310550.

The product of its digits is 648, while the sum is 24.

The square root of 931641 is about 965.2155199747. The cubic root of 931641 is about 97.6673785057.

The spelling of 931641 in words is "nine hundred thirty-one thousand, six hundred forty-one".