72075623 has 4 divisors (see below), whose sum is σ = 72944088. Its totient is φ = 71207160.

The previous prime is 72075599. The next prime is 72075691. The reversal of 72075623 is 32657027.

It is a happy number.

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 72075623 - 2²⁴ = 55298407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72075623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72077623) 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, 434108 + ... + 434273.

It is an arithmetic number, because the mean of its divisors is an integer number (18236022).

Almost surely, 2^72075623 is an apocalyptic number.

72075623 is a deficient number, since it is larger than the sum of its proper divisors (868465).

72075623 is an equidigital number, since it uses as much as digits as its factorization.

72075623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868464.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 72075623 is about 8489.7363327726. The cubic root of 72075623 is about 416.1623638127.

The spelling of 72075623 in words is "seventy-two million, seventy-five thousand, six hundred twenty-three".