74249447 has 4 divisors (see below), whose sum is σ = 74306976. Its totient is φ = 74191920.

The previous prime is 74249437. The next prime is 74249453. The reversal of 74249447 is 74494247.

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 74249447 - 2⁴ = 74249431 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 (74249437) 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, 26783 + ... + 29424.

It is an arithmetic number, because the mean of its divisors is an integer number (18576744).

Almost surely, 2^74249447 is an apocalyptic number.

74249447 is a deficient number, since it is larger than the sum of its proper divisors (57529).

74249447 is a wasteful number, since it uses less digits than its factorization.

74249447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57528.

The product of its digits is 225792, while the sum is 41.

The square root of 74249447 is about 8616.8118814327. The cubic root of 74249447 is about 420.3048561427.

The spelling of 74249447 in words is "seventy-four million, two hundred forty-nine thousand, four hundred forty-seven".