9000493921 has 2 divisors, whose sum is σ = 9000493922. Its totient is φ = 9000493920.

The previous prime is 9000493913. The next prime is 9000493939. The reversal of 9000493921 is 1293940009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7368333921 + 1632160000 = 85839^2 + 40400^2 .

It is a cyclic number.

It is not a de Polignac number, because 9000493921 - 2³ = 9000493913 is a prime.

It is not a weakly prime, because it can be changed into another prime (9000493321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4500246960 + 4500246961.

It is an arithmetic number, because the mean of its divisors is an integer number (4500246961).

Almost surely, 2^9000493921 is an apocalyptic number.

It is an amenable number.

9000493921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9000493921 is an equidigital number, since it uses as much as digits as its factorization.

9000493921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 9000493921 is about 94870.9329615768. The cubic root of 9000493921 is about 2080.1218740996.

The spelling of 9000493921 in words is "nine billion, four hundred ninety-three thousand, nine hundred twenty-one".