60910721 has 2 divisors, whose sum is σ = 60910722. Its totient is φ = 60910720.

The previous prime is 60910709. The next prime is 60910723. The reversal of 60910721 is 12701906.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54228496 + 6682225 = 7364^2 + 2585^2 .

It is a cyclic number.

It is not a de Polignac number, because 60910721 - 2²² = 56716417 is a prime.

It is a Sophie Germain prime.

Together with 60910723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (60910723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30455360 + 30455361.

It is an arithmetic number, because the mean of its divisors is an integer number (30455361).

Almost surely, 2^60910721 is an apocalyptic number.

It is an amenable number.

60910721 is a deficient number, since it is larger than the sum of its proper divisors (1).

60910721 is an equidigital number, since it uses as much as digits as its factorization.

60910721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 60910721 is about 7804.5320807849. The cubic root of 60910721 is about 393.4575772559.

The spelling of 60910721 in words is "sixty million, nine hundred ten thousand, seven hundred twenty-one".