72063889 has 4 divisors (see below), whose sum is σ = 72116800. Its totient is φ = 72010980.

The previous prime is 72063881. The next prime is 72063907. The reversal of 72063889 is 98836027.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98836027 = 227 ⋅435401.

It is a cyclic number.

It is not a de Polignac number, because 72063889 - 2³ = 72063881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72063881) 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, 24357 + ... + 27154.

It is an arithmetic number, because the mean of its divisors is an integer number (18029200).

Almost surely, 2^72063889 is an apocalyptic number.

It is an amenable number.

72063889 is a deficient number, since it is larger than the sum of its proper divisors (52911).

72063889 is a wasteful number, since it uses less digits than its factorization.

72063889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52910.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 72063889 is about 8489.0452348895. The cubic root of 72063889 is about 416.1397786723.

The spelling of 72063889 in words is "seventy-two million, sixty-three thousand, eight hundred eighty-nine".