72789047 has 2 divisors, whose sum is σ = 72789048. Its totient is φ = 72789046.

The previous prime is 72789037. The next prime is 72789071. The reversal of 72789047 is 74098727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72789047 - 2¹² = 72784951 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72788989 and 72789007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72789037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36394523 + 36394524.

It is an arithmetic number, because the mean of its divisors is an integer number (36394524).

Almost surely, 2^72789047 is an apocalyptic number.

72789047 is a deficient number, since it is larger than the sum of its proper divisors (1).

72789047 is an equidigital number, since it uses as much as digits as its factorization.

72789047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 72789047 is about 8531.6497232364. The cubic root of 72789047 is about 417.5309539960.

The spelling of 72789047 in words is "seventy-two million, seven hundred eighty-nine thousand, forty-seven".