4589390921 has 2 divisors, whose sum is σ = 4589390922. Its totient is φ = 4589390920.

The previous prime is 4589390899. The next prime is 4589390959. The reversal of 4589390921 is 1290939854.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3217725625 + 1371665296 = 56725^2 + 37036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4589390921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4589390921.

It is not a weakly prime, because it can be changed into another prime (4589380921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2294695460 + 2294695461.

It is an arithmetic number, because the mean of its divisors is an integer number (2294695461).

Almost surely, 2^4589390921 is an apocalyptic number.

It is an amenable number.

4589390921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4589390921 is an equidigital number, since it uses as much as digits as its factorization.

4589390921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 4589390921 is about 67745.0435161127. The cubic root of 4589390921 is about 1661.8239641992.

The spelling of 4589390921 in words is "four billion, five hundred eighty-nine million, three hundred ninety thousand, nine hundred twenty-one".