74223817 has 4 divisors (see below), whose sum is σ = 76034196. Its totient is φ = 72413440.

The previous prime is 74223749. The next prime is 74223833. The reversal of 74223817 is 71832247.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7817616 + 66406201 = 2796^2 + 8149^2 .

It is a cyclic number.

It is not a de Polignac number, because 74223817 - 2¹⁵ = 74191049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74223917) 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, 905128 + ... + 905209.

It is an arithmetic number, because the mean of its divisors is an integer number (19008549).

Almost surely, 2^74223817 is an apocalyptic number.

It is an amenable number.

74223817 is a deficient number, since it is larger than the sum of its proper divisors (1810379).

74223817 is a wasteful number, since it uses less digits than its factorization.

74223817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810378.

The product of its digits is 18816, while the sum is 34.

The square root of 74223817 is about 8615.3245440900. The cubic root of 74223817 is about 420.2564892136.

The spelling of 74223817 in words is "seventy-four million, two hundred twenty-three thousand, eight hundred seventeen".