1247417076889 has 2 divisors, whose sum is σ = 1247417076890. Its totient is φ = 1247417076888.

The previous prime is 1247417076809. The next prime is 1247417076911. The reversal of 1247417076889 is 9886707147421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1053538016400 + 193879060489 = 1026420^2 + 440317^2 .

It is a cyclic number.

It is not a de Polignac number, because 1247417076889 - 2⁷ = 1247417076761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1247417076889.

It is not a weakly prime, because it can be changed into another prime (1247417076809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623708538444 + 623708538445.

It is an arithmetic number, because the mean of its divisors is an integer number (623708538445).

Almost surely, 2^{1247417076889} is an apocalyptic number.

It is an amenable number.

1247417076889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247417076889 is an equidigital number, since it uses as much as digits as its factorization.

1247417076889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37933056, while the sum is 64.

The spelling of 1247417076889 in words is "one trillion, two hundred forty-seven billion, four hundred seventeen million, seventy-six thousand, eight hundred eighty-nine".