947440129 has 2 divisors, whose sum is σ = 947440130. Its totient is φ = 947440128.

The previous prime is 947440051. The next prime is 947440133. The reversal of 947440129 is 921044749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 717007729 + 230432400 = 26777^2 + 15180^2 .

It is a cyclic number.

It is not a de Polignac number, because 947440129 - 2⁷ = 947440001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 947440091 and 947440100.

It is not a weakly prime, because it can be changed into another prime (947440139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473720064 + 473720065.

It is an arithmetic number, because the mean of its divisors is an integer number (473720065).

Almost surely, 2^947440129 is an apocalyptic number.

It is an amenable number.

947440129 is a deficient number, since it is larger than the sum of its proper divisors (1).

947440129 is an equidigital number, since it uses as much as digits as its factorization.

947440129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 947440129 is about 30780.5154115392. The cubic root of 947440129 is about 982.1638045404.

The spelling of 947440129 in words is "nine hundred forty-seven million, four hundred forty thousand, one hundred twenty-nine".