74378939 has 8 divisors (see below), whose sum is σ = 80994000. Its totient is φ = 68033952.

The previous prime is 74378923. The next prime is 74378989. The reversal of 74378939 is 93987347.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74378939 - 2⁴ = 74378923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74378989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66944 + ... + 68045.

It is an arithmetic number, because the mean of its divisors is an integer number (10124250).

Almost surely, 2^74378939 is an apocalyptic number.

74378939 is a deficient number, since it is larger than the sum of its proper divisors (6615061).

74378939 is a wasteful number, since it uses less digits than its factorization.

74378939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135037.

The product of its digits is 1143072, while the sum is 50.

The square root of 74378939 is about 8624.3225241175. The cubic root of 74378939 is about 420.5490532795.

The spelling of 74378939 in words is "seventy-four million, three hundred seventy-eight thousand, nine hundred thirty-nine".