74279447 has 16 divisors (see below), whose sum is σ = 84509568. Its totient is φ = 64690080.

The previous prime is 74279431. The next prime is 74279449. The reversal of 74279447 is 74497247.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 74279447 - 2⁴ = 74279431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74279398 and 74279407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74279449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23588 + ... + 26550.

It is an arithmetic number, because the mean of its divisors is an integer number (5281848).

Almost surely, 2^74279447 is an apocalyptic number.

74279447 is a deficient number, since it is larger than the sum of its proper divisors (10230121).

74279447 is a wasteful number, since it uses less digits than its factorization.

74279447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070.

The product of its digits is 395136, while the sum is 44.

The square root of 74279447 is about 8618.5524886723. The cubic root of 74279447 is about 420.3614556567.

The spelling of 74279447 in words is "seventy-four million, two hundred seventy-nine thousand, four hundred forty-seven".