74399407 has 4 divisors (see below), whose sum is σ = 74561256. Its totient is φ = 74237560.

The previous prime is 74399399. The next prime is 74399419. The reversal of 74399407 is 70499347.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 74399407 - 2³ = 74399399 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 (74399447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80233 + ... + 81154.

It is an arithmetic number, because the mean of its divisors is an integer number (18640314).

Almost surely, 2^74399407 is an apocalyptic number.

74399407 is a deficient number, since it is larger than the sum of its proper divisors (161849).

74399407 is a wasteful number, since it uses less digits than its factorization.

74399407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161848.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 74399407 is about 8625.5090864250. The cubic root of 74399407 is about 420.5876260649.

The spelling of 74399407 in words is "seventy-four million, three hundred ninety-nine thousand, four hundred seven".