72069878429 has 2 divisors, whose sum is σ = 72069878430. Its totient is φ = 72069878428.

The previous prime is 72069878411. The next prime is 72069878449. The reversal of 72069878429 is 92487896027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41790398329 + 30279480100 = 204427^2 + 174010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72069878429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72069878449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36034939214 + 36034939215.

It is an arithmetic number, because the mean of its divisors is an integer number (36034939215).

Almost surely, 2^72069878429 is an apocalyptic number.

It is an amenable number.

72069878429 is a deficient number, since it is larger than the sum of its proper divisors (1).

72069878429 is an equidigital number, since it uses as much as digits as its factorization.

72069878429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 62.

The spelling of 72069878429 in words is "seventy-two billion, sixty-nine million, eight hundred seventy-eight thousand, four hundred twenty-nine".