984730921 has 2 divisors, whose sum is σ = 984730922. Its totient is φ = 984730920.

The previous prime is 984730919. The next prime is 984730973. The reversal of 984730921 is 129037489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663783696 + 320947225 = 25764^2 + 17915^2 .

It is a cyclic number.

It is not a de Polignac number, because 984730921 - 2¹ = 984730919 is a prime.

Together with 984730919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (984733921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492365460 + 492365461.

It is an arithmetic number, because the mean of its divisors is an integer number (492365461).

Almost surely, 2^984730921 is an apocalyptic number.

It is an amenable number.

984730921 is a deficient number, since it is larger than the sum of its proper divisors (1).

984730921 is an equidigital number, since it uses as much as digits as its factorization.

984730921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 984730921 is about 31380.4225752299. The cubic root of 984730921 is about 994.8841800156.

The spelling of 984730921 in words is "nine hundred eighty-four million, seven hundred thirty thousand, nine hundred twenty-one".