72389453 has 2 divisors, whose sum is σ = 72389454. Its totient is φ = 72389452.

The previous prime is 72389437. The next prime is 72389483. The reversal of 72389453 is 35498327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61512649 + 10876804 = 7843^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 72389453 - 2⁴ = 72389437 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72389453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72389483) 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 as a sum of consecutive naturals, namely, 36194726 + 36194727.

It is an arithmetic number, because the mean of its divisors is an integer number (36194727).

Almost surely, 2^72389453 is an apocalyptic number.

It is an amenable number.

72389453 is a deficient number, since it is larger than the sum of its proper divisors (1).

72389453 is an equidigital number, since it uses as much as digits as its factorization.

72389453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 72389453 is about 8508.1991631602. The cubic root of 72389453 is about 416.7655040907.

The spelling of 72389453 in words is "seventy-two million, three hundred eighty-nine thousand, four hundred fifty-three".