60781289 has 2 divisors, whose sum is σ = 60781290. Its totient is φ = 60781288.

The previous prime is 60781223. The next prime is 60781291. The reversal of 60781289 is 98218706.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47334400 + 13446889 = 6880^2 + 3667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60781289 is a prime.

Together with 60781291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (60781219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30390644 + 30390645.

It is an arithmetic number, because the mean of its divisors is an integer number (30390645).

Almost surely, 2^60781289 is an apocalyptic number.

It is an amenable number.

60781289 is a deficient number, since it is larger than the sum of its proper divisors (1).

60781289 is an equidigital number, since it uses as much as digits as its factorization.

60781289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 60781289 is about 7796.2355659639. The cubic root of 60781289 is about 393.1786875705.

The spelling of 60781289 in words is "sixty million, seven hundred eighty-one thousand, two hundred eighty-nine".