74122387 has 4 divisors (see below), whose sum is σ = 74364136. Its totient is φ = 73880640.

The previous prime is 74122379. The next prime is 74122393. The reversal of 74122387 is 78322147.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78322147 = 307 ⋅255121.

It is a cyclic number.

It is not a de Polignac number, because 74122387 - 2³ = 74122379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74122327) 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, 120414 + ... + 121027.

It is an arithmetic number, because the mean of its divisors is an integer number (18591034).

Almost surely, 2^74122387 is an apocalyptic number.

74122387 is a deficient number, since it is larger than the sum of its proper divisors (241749).

74122387 is a wasteful number, since it uses less digits than its factorization.

74122387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241748.

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

The square root of 74122387 is about 8609.4359280966. The cubic root of 74122387 is about 420.0649691634.

The spelling of 74122387 in words is "seventy-four million, one hundred twenty-two thousand, three hundred eighty-seven".