921959 has 2 divisors, whose sum is σ = 921960. Its totient is φ = 921958.

The previous prime is 921931. The next prime is 921989. The reversal of 921959 is 959129.

921959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 921959 - 2⁸ = 921703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460979 + 460980.

It is an arithmetic number, because the mean of its divisors is an integer number (460980).

2⁹²¹⁹⁵⁹ is an apocalyptic number.

921959 is a deficient number, since it is larger than the sum of its proper divisors (1).

921959 is an equidigital number, since it uses as much as digits as its factorization.

921959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 35.

The square root of 921959 is about 960.1869609612. The cubic root of 921959 is about 97.3278663450.

The spelling of 921959 in words is "nine hundred twenty-one thousand, nine hundred fifty-nine".