984532721 has 2 divisors, whose sum is σ = 984532722. Its totient is φ = 984532720.

The previous prime is 984532711. The next prime is 984532723. The reversal of 984532721 is 127235489.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 709636321 + 274896400 = 26639^2 + 16580^2 .

It is a cyclic number.

It is not a de Polignac number, because 984532721 - 2⁶ = 984532657 is a prime.

Together with 984532723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (984532723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492266360 + 492266361.

It is an arithmetic number, because the mean of its divisors is an integer number (492266361).

Almost surely, 2^984532721 is an apocalyptic number.

It is an amenable number.

984532721 is a deficient number, since it is larger than the sum of its proper divisors (1).

984532721 is an equidigital number, since it uses as much as digits as its factorization.

984532721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 984532721 is about 31377.2643963746. The cubic root of 984532721 is about 994.8174276771.

The spelling of 984532721 in words is "nine hundred eighty-four million, five hundred thirty-two thousand, seven hundred twenty-one".