72013559 has 2 divisors, whose sum is σ = 72013560. Its totient is φ = 72013558.

The previous prime is 72013531. The next prime is 72013607. The reversal of 72013559 is 95531027.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72013559 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72013159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36006779 + 36006780.

It is an arithmetic number, because the mean of its divisors is an integer number (36006780).

Almost surely, 2^72013559 is an apocalyptic number.

72013559 is a deficient number, since it is larger than the sum of its proper divisors (1).

72013559 is an equidigital number, since it uses as much as digits as its factorization.

72013559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 72013559 is about 8486.0803083638. The cubic root of 72013559 is about 416.0428776532.

The spelling of 72013559 in words is "seventy-two million, thirteen thousand, five hundred fifty-nine".