72303065 has 4 divisors (see below), whose sum is σ = 86763684. Its totient is φ = 57842448.

The previous prime is 72303047. The next prime is 72303073. The reversal of 72303065 is 56030327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56030327 = 1877 ⋅29851.

It can be written as a sum of positive squares in 2 ways, for example, as 33825856 + 38477209 = 5816^2 + 6203^2 .

It is a cyclic number.

It is not a de Polignac number, because 72303065 - 2⁶ = 72303001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 7230302 + ... + 7230311.

It is an arithmetic number, because the mean of its divisors is an integer number (21690921).

Almost surely, 2^72303065 is an apocalyptic number.

It is an amenable number.

72303065 is a deficient number, since it is larger than the sum of its proper divisors (14460619).

72303065 is a wasteful number, since it uses less digits than its factorization.

72303065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14460618.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 72303065 is about 8503.1208976469. The cubic root of 72303065 is about 416.5996518000.

The spelling of 72303065 in words is "seventy-two million, three hundred three thousand, sixty-five".