1247417078889 has 8 divisors (see below), whose sum is σ = 1663232595840. Its totient is φ = 831606473936.

The previous prime is 1247417078861. The next prime is 1247417078951. The reversal of 1247417078889 is 9888707147421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1247417078889 - 2¹⁷ = 1247416947817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1247417076889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587754 + ... + 1685315.

It is an arithmetic number, because the mean of its divisors is an integer number (207904074480).

Almost surely, 2^{1247417078889} is an apocalyptic number.

It is an amenable number.

1247417078889 is a deficient number, since it is larger than the sum of its proper divisors (415815516951).

1247417078889 is a wasteful number, since it uses less digits than its factorization.

1247417078889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455999.

The product of its (nonzero) digits is 50577408, while the sum is 66.

The spelling of 1247417078889 in words is "one trillion, two hundred forty-seven billion, four hundred seventeen million, seventy-eight thousand, eight hundred eighty-nine".