72104779 has 2 divisors, whose sum is σ = 72104780. Its totient is φ = 72104778.

The previous prime is 72104777. The next prime is 72104807. The reversal of 72104779 is 97740127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72104779 - 2¹ = 72104777 is a prime.

Together with 72104777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72104771) 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, 36052389 + 36052390.

It is an arithmetic number, because the mean of its divisors is an integer number (36052390).

Almost surely, 2^72104779 is an apocalyptic number.

72104779 is a deficient number, since it is larger than the sum of its proper divisors (1).

72104779 is an equidigital number, since it uses as much as digits as its factorization.

72104779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 72104779 is about 8491.4532913984. The cubic root of 72104779 is about 416.2184715213.

The spelling of 72104779 in words is "seventy-two million, one hundred four thousand, seven hundred seventy-nine".