960081721 has 2 divisors, whose sum is σ = 960081722. Its totient is φ = 960081720.

The previous prime is 960081691. The next prime is 960081767. The reversal of 960081721 is 127180069.

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., 508051600 + 452030121 = 22540^2 + 21261^2 .

It is an emirp because it is prime and its reverse (127180069) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 960081721 - 2⁹ = 960081209 is a prime.

It is not a weakly prime, because it can be changed into another prime (960061721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480040860 + 480040861.

It is an arithmetic number, because the mean of its divisors is an integer number (480040861).

Almost surely, 2^960081721 is an apocalyptic number.

It is an amenable number.

960081721 is a deficient number, since it is larger than the sum of its proper divisors (1).

960081721 is an equidigital number, since it uses as much as digits as its factorization.

960081721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 960081721 is about 30985.1855085620. The cubic root of 960081721 is about 986.5128207875.

The spelling of 960081721 in words is "nine hundred sixty million, eighty-one thousand, seven hundred twenty-one".