74043991 has 8 divisors (see below), whose sum is σ = 86685984. Its totient is φ = 61918080.

The previous prime is 74043971. The next prime is 74044031. The reversal of 74043991 is 19934047.

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

It is not a de Polignac number, because 74043991 - 2¹⁷ = 73912919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74043991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74043961) 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, 128710 + ... + 129283.

It is an arithmetic number, because the mean of its divisors is an integer number (10835748).

Almost surely, 2^74043991 is an apocalyptic number.

74043991 is a deficient number, since it is larger than the sum of its proper divisors (12641993).

74043991 is a wasteful number, since it uses less digits than its factorization.

74043991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258041.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 74043991 is about 8604.8818120878. The cubic root of 74043991 is about 419.9168221527.

The spelling of 74043991 in words is "seventy-four million, forty-three thousand, nine hundred ninety-one".