74170399 has 4 divisors (see below), whose sum is σ = 75895336. Its totient is φ = 72445464.

The previous prime is 74170391. The next prime is 74170441. The reversal of 74170399 is 99307147.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99307147 = 373 ⋅266239.

It is a cyclic number.

It is not a de Polignac number, because 74170399 - 2³ = 74170391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74170391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862404 + ... + 862489.

It is an arithmetic number, because the mean of its divisors is an integer number (18973834).

Almost surely, 2^74170399 is an apocalyptic number.

74170399 is a deficient number, since it is larger than the sum of its proper divisors (1724937).

74170399 is a wasteful number, since it uses less digits than its factorization.

74170399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724936.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 74170399 is about 8612.2238126979. The cubic root of 74170399 is about 420.1556471493.

The spelling of 74170399 in words is "seventy-four million, one hundred seventy thousand, three hundred ninety-nine".