74873213 has 2 divisors, whose sum is σ = 74873214. Its totient is φ = 74873212.

The previous prime is 74873159. The next prime is 74873261. The reversal of 74873213 is 31237847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56580484 + 18292729 = 7522^2 + 4277^2 .

It is an emirp because it is prime and its reverse (31237847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74873213 - 2⁸ = 74872957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74878213) 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, 37436606 + 37436607.

It is an arithmetic number, because the mean of its divisors is an integer number (37436607).

Almost surely, 2^74873213 is an apocalyptic number.

It is an amenable number.

74873213 is a deficient number, since it is larger than the sum of its proper divisors (1).

74873213 is an equidigital number, since it uses as much as digits as its factorization.

74873213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 74873213 is about 8652.9308907445. The cubic root of 74873213 is about 421.4785624012.

The spelling of 74873213 in words is "seventy-four million, eight hundred seventy-three thousand, two hundred thirteen".