72505703 has 4 divisors (see below), whose sum is σ = 72546288. Its totient is φ = 72465120.

The previous prime is 72505687. The next prime is 72505711. The reversal of 72505703 is 30750527.

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 72505703 - 2⁴ = 72505687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72505723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17483 + ... + 21228.

It is an arithmetic number, because the mean of its divisors is an integer number (18136572).

Almost surely, 2^72505703 is an apocalyptic number.

72505703 is a deficient number, since it is larger than the sum of its proper divisors (40585).

72505703 is a wasteful number, since it uses less digits than its factorization.

72505703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40584.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 72505703 is about 8515.0280680688. The cubic root of 72505703 is about 416.9884789223.

The spelling of 72505703 in words is "seventy-two million, five hundred five thousand, seven hundred three".