947659551121 has 2 divisors, whose sum is σ = 947659551122. Its totient is φ = 947659551120.

The previous prime is 947659551107. The next prime is 947659551217. The reversal of 947659551121 is 121155956749.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783906598225 + 163752952896 = 885385^2 + 404664^2 .

It is a cyclic number.

It is not a de Polignac number, because 947659551121 - 2⁵ = 947659551089 is a prime.

It is not a weakly prime, because it can be changed into another prime (947659552121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473829775560 + 473829775561.

It is an arithmetic number, because the mean of its divisors is an integer number (473829775561).

Almost surely, 2^947659551121 is an apocalyptic number.

It is an amenable number.

947659551121 is a deficient number, since it is larger than the sum of its proper divisors (1).

947659551121 is an equidigital number, since it uses as much as digits as its factorization.

947659551121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402000, while the sum is 55.

The spelling of 947659551121 in words is "nine hundred forty-seven billion, six hundred fifty-nine million, five hundred fifty-one thousand, one hundred twenty-one".