921040959 has 8 divisors (see below), whose sum is σ = 1236188032. Its totient is φ = 609960600.

The previous prime is 921040937. The next prime is 921040973. The reversal of 921040959 is 959040129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 921040959 - 2¹³ = 921032767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921040919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016149 + ... + 1017054.

It is an arithmetic number, because the mean of its divisors is an integer number (154523504).

Almost surely, 2^921040959 is an apocalyptic number.

921040959 is a deficient number, since it is larger than the sum of its proper divisors (315147073).

921040959 is a wasteful number, since it uses less digits than its factorization.

921040959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033357.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 921040959 is about 30348.6566259530. The cubic root of 921040959 is about 972.9555086415.

The spelling of 921040959 in words is "nine hundred twenty-one million, forty thousand, nine hundred fifty-nine".