74282991 has 4 divisors (see below), whose sum is σ = 99043992. Its totient is φ = 49521992.

The previous prime is 74282959. The next prime is 74282993. The reversal of 74282991 is 19928247.

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 74282991 - 2⁵ = 74282959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74282993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12380496 + ... + 12380501.

It is an arithmetic number, because the mean of its divisors is an integer number (24760998).

Almost surely, 2^74282991 is an apocalyptic number.

74282991 is a deficient number, since it is larger than the sum of its proper divisors (24761001).

74282991 is a wasteful number, since it uses less digits than its factorization.

74282991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24761000.

The product of its digits is 72576, while the sum is 42.

The square root of 74282991 is about 8618.7580891913. The cubic root of 74282991 is about 420.3681409394.

The spelling of 74282991 in words is "seventy-four million, two hundred eighty-two thousand, nine hundred ninety-one".