72539567 has 2 divisors, whose sum is σ = 72539568. Its totient is φ = 72539566.

The previous prime is 72539543. The next prime is 72539569. The reversal of 72539567 is 76593527.

It is a strong prime.

It is an emirp because it is prime and its reverse (76593527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72539567 - 2⁶ = 72539503 is a prime.

Together with 72539569, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72539569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36269783 + 36269784.

It is an arithmetic number, because the mean of its divisors is an integer number (36269784).

Almost surely, 2^72539567 is an apocalyptic number.

72539567 is a deficient number, since it is larger than the sum of its proper divisors (1).

72539567 is an equidigital number, since it uses as much as digits as its factorization.

72539567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 44.

The square root of 72539567 is about 8517.0163202849. The cubic root of 72539567 is about 417.0533873798.

The spelling of 72539567 in words is "seventy-two million, five hundred thirty-nine thousand, five hundred sixty-seven".