78971471429 has 2 divisors, whose sum is σ = 78971471430. Its totient is φ = 78971471428.

The previous prime is 78971471401. The next prime is 78971471443. The reversal of 78971471429 is 92417417987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57985603204 + 20985868225 = 240802^2 + 144865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78971471429 is a prime.

It is a super-2 number, since 2×78971471429² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78971471489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39485735714 + 39485735715.

It is an arithmetic number, because the mean of its divisors is an integer number (39485735715).

Almost surely, 2^78971471429 is an apocalyptic number.

It is an amenable number.

78971471429 is a deficient number, since it is larger than the sum of its proper divisors (1).

78971471429 is an equidigital number, since it uses as much as digits as its factorization.

78971471429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 59.

The spelling of 78971471429 in words is "seventy-eight billion, nine hundred seventy-one million, four hundred seventy-one thousand, four hundred twenty-nine".