72366449 has 4 divisors (see below), whose sum is σ = 73282560. Its totient is φ = 71450340.

The previous prime is 72366403. The next prime is 72366451. The reversal of 72366449 is 94466327.

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: 94466327 = 131 ⋅721117.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72366449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72366949) 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, 457937 + ... + 458094.

It is an arithmetic number, because the mean of its divisors is an integer number (18320640).

Almost surely, 2^72366449 is an apocalyptic number.

72366449 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

72366449 is a deficient number, since it is larger than the sum of its proper divisors (916111).

72366449 is an equidigital number, since it uses as much as digits as its factorization.

72366449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916110.

The product of its digits is 217728, while the sum is 41.

The square root of 72366449 is about 8506.8471832989. The cubic root of 72366449 is about 416.7213526801.

The spelling of 72366449 in words is "seventy-two million, three hundred sixty-six thousand, four hundred forty-nine".