72135807 has 4 divisors (see below), whose sum is σ = 96181080. Its totient is φ = 48090536.

The previous prime is 72135781. The next prime is 72135827. The reversal of 72135807 is 70853127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72135807 - 2⁸ = 72135551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72135827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12022632 + ... + 12022637.

It is an arithmetic number, because the mean of its divisors is an integer number (24045270).

Almost surely, 2^72135807 is an apocalyptic number.

72135807 is a deficient number, since it is larger than the sum of its proper divisors (24045273).

72135807 is a wasteful number, since it uses less digits than its factorization.

72135807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24045272.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 72135807 is about 8493.2801084151. The cubic root of 72135807 is about 416.2781650900.

The spelling of 72135807 in words is "seventy-two million, one hundred thirty-five thousand, eight hundred seven".