72648089 has 4 divisors (see below), whose sum is σ = 76921524. Its totient is φ = 68374656.

The previous prime is 72648083. The next prime is 72648109. The reversal of 72648089 is 98084627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98084627 = 23 ⋅4264549.

It can be written as a sum of positive squares in 2 ways, for example, as 61889689 + 10758400 = 7867^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 72648089 - 2⁴ = 72648073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72648083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2136692 + ... + 2136725.

It is an arithmetic number, because the mean of its divisors is an integer number (19230381).

Almost surely, 2^72648089 is an apocalyptic number.

It is an amenable number.

72648089 is a deficient number, since it is larger than the sum of its proper divisors (4273435).

72648089 is a wasteful number, since it uses less digits than its factorization.

72648089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273434.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 72648089 is about 8523.3848323304. The cubic root of 72648089 is about 417.2612597559.

The spelling of 72648089 in words is "seventy-two million, six hundred forty-eight thousand, eighty-nine".