60717721 has 2 divisors, whose sum is σ = 60717722. Its totient is φ = 60717720.

The previous prime is 60717719. The next prime is 60717731. The reversal of 60717721 is 12771706.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45225625 + 15492096 = 6725^2 + 3936^2 .

It is a cyclic number.

It is not a de Polignac number, because 60717721 - 2¹ = 60717719 is a prime.

Together with 60717719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (60717731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30358860 + 30358861.

It is an arithmetic number, because the mean of its divisors is an integer number (30358861).

Almost surely, 2^60717721 is an apocalyptic number.

It is an amenable number.

60717721 is a deficient number, since it is larger than the sum of its proper divisors (1).

60717721 is an equidigital number, since it uses as much as digits as its factorization.

60717721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 60717721 is about 7792.1576601093. The cubic root of 60717721 is about 393.0415713545.

The spelling of 60717721 in words is "sixty million, seven hundred seventeen thousand, seven hundred twenty-one".