60648781 has 2 divisors, whose sum is σ = 60648782. Its totient is φ = 60648780.

The previous prime is 60648761. The next prime is 60648829. The reversal of 60648781 is 18784606.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37319881 + 23328900 = 6109^2 + 4830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60648781 is a prime.

It is a super-2 number, since 2×60648781² = 7356549273571922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60648761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30324390 + 30324391.

It is an arithmetic number, because the mean of its divisors is an integer number (30324391).

Almost surely, 2^60648781 is an apocalyptic number.

It is an amenable number.

60648781 is a deficient number, since it is larger than the sum of its proper divisors (1).

60648781 is an equidigital number, since it uses as much as digits as its factorization.

60648781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 60648781 is about 7787.7327252545. The cubic root of 60648781 is about 392.8927595131.

The spelling of 60648781 in words is "sixty million, six hundred forty-eight thousand, seven hundred eighty-one".