72870559 has 2 divisors, whose sum is σ = 72870560. Its totient is φ = 72870558.

The previous prime is 72870557. The next prime is 72870563. The reversal of 72870559 is 95507827.

It is a weak prime.

It is an emirp because it is prime and its reverse (95507827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72870559 - 2¹ = 72870557 is a prime.

Together with 72870557, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72870557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36435279 + 36435280.

It is an arithmetic number, because the mean of its divisors is an integer number (36435280).

Almost surely, 2^72870559 is an apocalyptic number.

72870559 is a deficient number, since it is larger than the sum of its proper divisors (1).

72870559 is an equidigital number, since it uses as much as digits as its factorization.

72870559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 72870559 is about 8536.4254228570. The cubic root of 72870559 is about 417.6867516437.

The spelling of 72870559 in words is "seventy-two million, eight hundred seventy thousand, five hundred fifty-nine".