911641 has 4 divisors (see below), whose sum is σ = 915300. Its totient is φ = 907984.

The previous prime is 911633. The next prime is 911657. The reversal of 911641 is 146119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146119 = 23 ⋅6353.

It can be written as a sum of positive squares in 2 ways, for example, as 495616 + 416025 = 704^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 911641 - 2³ = 911633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (911621) 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 3 ways as a sum of consecutive naturals, for example, 1426 + ... + 1963.

It is an arithmetic number, because the mean of its divisors is an integer number (228825).

2⁹¹¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

911641 is a deficient number, since it is larger than the sum of its proper divisors (3659).

911641 is a wasteful number, since it uses less digits than its factorization.

911641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658.

The product of its digits is 216, while the sum is 22.

The square root of 911641 is about 954.7989317129. The cubic root of 911641 is about 96.9634254713.

It can be divided in two parts, 91 and 1641, that multiplied together give a triangular number (149331 = T₅₄₆).

The spelling of 911641 in words is "nine hundred eleven thousand, six hundred forty-one".