921359 has 4 divisors (see below), whose sum is σ = 953160. Its totient is φ = 889560.

The previous prime is 921353. The next prime is 921373. The reversal of 921359 is 953129.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 953129 = 293 ⋅3253.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 31771 = 921359 / (9 + 2 + 1 + 3 + 5 + 9).

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921353) 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, 15857 + ... + 15914.

It is an arithmetic number, because the mean of its divisors is an integer number (238290).

2⁹²¹³⁵⁹ is an apocalyptic number.

921359 is a deficient number, since it is larger than the sum of its proper divisors (31801).

921359 is a wasteful number, since it uses less digits than its factorization.

921359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31800.

The product of its digits is 2430, while the sum is 29.

The square root of 921359 is about 959.8744709596. The cubic root of 921359 is about 97.3067484890.

The spelling of 921359 in words is "nine hundred twenty-one thousand, three hundred fifty-nine".