74983991 has 8 divisors (see below), whose sum is σ = 79715664. Its totient is φ = 70288000.

The previous prime is 74983981. The next prime is 74984003. The reversal of 74983991 is 19938947.

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

It is a cyclic number.

It is not a de Polignac number, because 74983991 - 2⁶ = 74983927 is a prime.

It is a super-3 number, since 3×74983991³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74983901) 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 7 ways as a sum of consecutive naturals, for example, 4520 + ... + 13053.

It is an arithmetic number, because the mean of its divisors is an integer number (9964458).

Almost surely, 2^74983991 is an apocalyptic number.

74983991 is a deficient number, since it is larger than the sum of its proper divisors (4731673).

74983991 is a wasteful number, since it uses less digits than its factorization.

74983991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17841.

The product of its digits is 489888, while the sum is 50.

The square root of 74983991 is about 8659.3297084705. The cubic root of 74983991 is about 421.6863249300.

The spelling of 74983991 in words is "seventy-four million, nine hundred eighty-three thousand, nine hundred ninety-one".