74332991 has 4 divisors (see below), whose sum is σ = 75914592. Its totient is φ = 72751392.

The previous prime is 74332961. The next prime is 74333029. The reversal of 74332991 is 19923347.

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 74332991 - 2¹⁰ = 74331967 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 (74332961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790730 + ... + 790823.

It is an arithmetic number, because the mean of its divisors is an integer number (18978648).

Almost surely, 2^74332991 is an apocalyptic number.

74332991 is a deficient number, since it is larger than the sum of its proper divisors (1581601).

74332991 is a wasteful number, since it uses less digits than its factorization.

74332991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581600.

The product of its digits is 40824, while the sum is 38.

The square root of 74332991 is about 8621.6582511719. The cubic root of 74332991 is about 420.4624366083.

The spelling of 74332991 in words is "seventy-four million, three hundred thirty-two thousand, nine hundred ninety-one".