940011921 has 12 divisors (see below), whose sum is σ = 1358606340. Its totient is φ = 626300160.

The previous prime is 940011913. The next prime is 940011959. The reversal of 940011921 is 129110049.

It can be written as a sum of positive squares in 2 ways, for example, as 641102400 + 298909521 = 25320^2 + 17289^2 .

It is not a de Polignac number, because 940011921 - 2³ = 940011913 is a prime.

It is a super-2 number, since 2×940011921² = 1767244823244220482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (940011901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14856 + ... + 45833.

It is an arithmetic number, because the mean of its divisors is an integer number (113217195).

Almost surely, 2^940011921 is an apocalyptic number.

It is an amenable number.

940011921 is a deficient number, since it is larger than the sum of its proper divisors (418594419).

940011921 is a wasteful number, since it uses less digits than its factorization.

940011921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62416 (or 62413 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 940011921 is about 30659.6138429694. The cubic root of 940011921 is about 979.5902497073.

It can be divided in two parts, 9400 and 11921, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 940011921 in words is "nine hundred forty million, eleven thousand, nine hundred twenty-one".