72755071 has 4 divisors (see below), whose sum is σ = 72824200. Its totient is φ = 72685944.

The previous prime is 72755057. The next prime is 72755077. The reversal of 72755071 is 17055727.

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 72755071 - 2⁷ = 72754943 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 (72755077) 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, 32961 + ... + 35098.

It is an arithmetic number, because the mean of its divisors is an integer number (18206050).

Almost surely, 2^72755071 is an apocalyptic number.

72755071 is a deficient number, since it is larger than the sum of its proper divisors (69129).

72755071 is a wasteful number, since it uses less digits than its factorization.

72755071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69128.

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 72755071 is about 8529.6583167205. The cubic root of 72755071 is about 417.4659797539.

The spelling of 72755071 in words is "seventy-two million, seven hundred fifty-five thousand, seventy-one".