911244421 has 16 divisors (see below), whose sum is σ = 988531776. Its totient is φ = 836833536.

The previous prime is 911244401. The next prime is 911244443. The reversal of 911244421 is 124442119.

It is a cyclic number.

It is not a de Polignac number, because 911244421 - 2¹¹ = 911242373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 911244421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (911244401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118135 + ... + 125611.

It is an arithmetic number, because the mean of its divisors is an integer number (61783236).

Almost surely, 2^911244421 is an apocalyptic number.

It is an amenable number.

911244421 is a deficient number, since it is larger than the sum of its proper divisors (77287355).

911244421 is a wasteful number, since it uses less digits than its factorization.

911244421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7668.

The product of its digits is 2304, while the sum is 28.

The square root of 911244421 is about 30186.8252885261. The cubic root of 911244421 is about 969.4936319768.

It can be divided in two parts, 91 and 1244421, that multiplied together give a palindrome (113242311).

The spelling of 911244421 in words is "nine hundred eleven million, two hundred forty-four thousand, four hundred twenty-one".