72539005 has 64 divisors (see below), whose sum is σ = 115084800. Its totient is φ = 42577920.

The previous prime is 72539003. The next prime is 72539053. The reversal of 72539005 is 50093527.

It is a happy number.

It is not a de Polignac number, because 72539005 - 2¹ = 72539003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72539003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 815001 + ... + 815089.

It is an arithmetic number, because the mean of its divisors is an integer number (1798200).

Almost surely, 2^72539005 is an apocalyptic number.

It is an amenable number.

72539005 is a deficient number, since it is larger than the sum of its proper divisors (42545795).

72539005 is a wasteful number, since it uses less digits than its factorization.

72539005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 72539005 is about 8516.9833274464. The cubic root of 72539005 is about 417.0523103372.

The spelling of 72539005 in words is "seventy-two million, five hundred thirty-nine thousand, five".