74991449 has 16 divisors (see below), whose sum is σ = 84962304. Its totient is φ = 65707200.

The previous prime is 74991443. The next prime is 74991451. The reversal of 74991449 is 94419947.

It is not a de Polignac number, because 74991449 - 2¹⁶ = 74925913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74991443) 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 15 ways as a sum of consecutive naturals, for example, 19604 + ... + 23114.

It is an arithmetic number, because the mean of its divisors is an integer number (5310144).

Almost surely, 2^74991449 is an apocalyptic number.

It is an amenable number.

74991449 is a deficient number, since it is larger than the sum of its proper divisors (9970855).

74991449 is a wasteful number, since it uses less digits than its factorization.

74991449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3608.

The product of its digits is 326592, while the sum is 47.

The square root of 74991449 is about 8659.7603315565. The cubic root of 74991449 is about 421.7003049468.

The spelling of 74991449 in words is "seventy-four million, nine hundred ninety-one thousand, four hundred forty-nine".