60007721 has 2 divisors, whose sum is σ = 60007722. Its totient is φ = 60007720.

The previous prime is 60007693. The next prime is 60007729. The reversal of 60007721 is 12770006.

It is a happy number.

60007721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59892121 + 115600 = 7739^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 60007721 - 2⁶ = 60007657 is a prime.

It is a super-2 number, since 2×60007721² = 7201853159227682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (60007729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30003860 + 30003861.

It is an arithmetic number, because the mean of its divisors is an integer number (30003861).

Almost surely, 2^60007721 is an apocalyptic number.

It is an amenable number.

60007721 is a deficient number, since it is larger than the sum of its proper divisors (1).

60007721 is an equidigital number, since it uses as much as digits as its factorization.

60007721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 60007721 is about 7746.4650647892. The cubic root of 60007721 is about 391.5035560039.

Adding to 60007721 its reverse (12770006), we get a palindrome (72777727).

The spelling of 60007721 in words is "sixty million, seven thousand, seven hundred twenty-one".