72179453 has 2 divisors, whose sum is σ = 72179454. Its totient is φ = 72179452.

The previous prime is 72179447. The next prime is 72179507. The reversal of 72179453 is 35497127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58951684 + 13227769 = 7678^2 + 3637^2 .

It is a cyclic number.

It is not a de Polignac number, because 72179453 - 2¹⁶ = 72113917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72179353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36089726 + 36089727.

It is an arithmetic number, because the mean of its divisors is an integer number (36089727).

Almost surely, 2^72179453 is an apocalyptic number.

It is an amenable number.

72179453 is a deficient number, since it is larger than the sum of its proper divisors (1).

72179453 is an equidigital number, since it uses as much as digits as its factorization.

72179453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 72179453 is about 8495.8491629736. The cubic root of 72179453 is about 416.3621049732.

The spelling of 72179453 in words is "seventy-two million, one hundred seventy-nine thousand, four hundred fifty-three".