942487921 has 2 divisors, whose sum is σ = 942487922. Its totient is φ = 942487920.

The previous prime is 942487919. The next prime is 942487927. The reversal of 942487921 is 129784249.

942487921 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 can be written as a sum of positive squares in only one way, i.e., 864360000 + 78127921 = 29400^2 + 8839^2 .

It is a cyclic number.

It is not a de Polignac number, because 942487921 - 2¹ = 942487919 is a prime.

Together with 942487919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (942487927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 471243960 + 471243961.

It is an arithmetic number, because the mean of its divisors is an integer number (471243961).

Almost surely, 2^942487921 is an apocalyptic number.

It is an amenable number.

942487921 is a deficient number, since it is larger than the sum of its proper divisors (1).

942487921 is an equidigital number, since it uses as much as digits as its factorization.

942487921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 942487921 is about 30699.9661400465. The cubic root of 942487921 is about 980.4495788813.

It can be divided in two parts, 9424879 and 21, that added together give a square (9424900 = 3070²).

The spelling of 942487921 in words is "nine hundred forty-two million, four hundred eighty-seven thousand, nine hundred twenty-one".