72323345 has 16 divisors (see below), whose sum is σ = 89490000. Its totient is φ = 56070144.

The previous prime is 72323309. The next prime is 72323347. The reversal of 72323345 is 54332327.

It can be written as a sum of positive squares in 8 ways, for example, as 4145296 + 68178049 = 2036^2 + 8257^2 .

It is a cyclic number.

It is not a de Polignac number, because 72323345 - 2⁶ = 72323281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72323347) 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 15 ways as a sum of consecutive naturals, for example, 57281 + ... + 58529.

It is an arithmetic number, because the mean of its divisors is an integer number (5593125).

Almost surely, 2^72323345 is an apocalyptic number.

It is an amenable number.

72323345 is a deficient number, since it is larger than the sum of its proper divisors (17166655).

72323345 is a wasteful number, since it uses less digits than its factorization.

72323345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604.

The product of its digits is 15120, while the sum is 29.

The square root of 72323345 is about 8504.3133173702. The cubic root of 72323345 is about 416.6385982870.

The spelling of 72323345 in words is "seventy-two million, three hundred twenty-three thousand, three hundred forty-five".