72043567 has 4 divisors (see below), whose sum is σ = 75175920. Its totient is φ = 68911216.

The previous prime is 72043541. The next prime is 72043577. The reversal of 72043567 is 76534027.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76534027 = 7607 ⋅10061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72043567 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 (72043507) 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, 1566142 + ... + 1566187.

It is an arithmetic number, because the mean of its divisors is an integer number (18793980).

Almost surely, 2^72043567 is an apocalyptic number.

72043567 is a deficient number, since it is larger than the sum of its proper divisors (3132353).

72043567 is a wasteful number, since it uses less digits than its factorization.

72043567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132352.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 72043567 is about 8487.8481960978. The cubic root of 72043567 is about 416.1006578877.

The spelling of 72043567 in words is "seventy-two million, forty-three thousand, five hundred sixty-seven".