74343553 has 2 divisors, whose sum is σ = 74343554. Its totient is φ = 74343552.

The previous prime is 74343547. The next prime is 74343571. The reversal of 74343553 is 35534347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45859984 + 28483569 = 6772^2 + 5337^2 .

It is an emirp because it is prime and its reverse (35534347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74343553 - 2⁹ = 74343041 is a prime.

It is not a weakly prime, because it can be changed into another prime (74343583) 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, 37171776 + 37171777.

It is an arithmetic number, because the mean of its divisors is an integer number (37171777).

Almost surely, 2^74343553 is an apocalyptic number.

It is an amenable number.

74343553 is a deficient number, since it is larger than the sum of its proper divisors (1).

74343553 is an equidigital number, since it uses as much as digits as its factorization.

74343553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 34.

The square root of 74343553 is about 8622.2707565931. The cubic root of 74343553 is about 420.4823502154.

The spelling of 74343553 in words is "seventy-four million, three hundred forty-three thousand, five hundred fifty-three".