73742891 has 4 divisors (see below), whose sum is σ = 73904712. Its totient is φ = 73581072.

The previous prime is 73742863. The next prime is 73742897. The reversal of 73742891 is 19824737.

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 73742891 - 2¹⁸ = 73480747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73742897) 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 3 ways as a sum of consecutive naturals, for example, 80225 + ... + 81138.

It is an arithmetic number, because the mean of its divisors is an integer number (18476178).

Almost surely, 2^73742891 is an apocalyptic number.

73742891 is a deficient number, since it is larger than the sum of its proper divisors (161821).

73742891 is a wasteful number, since it uses less digits than its factorization.

73742891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161820.

The product of its digits is 84672, while the sum is 41.

The square root of 73742891 is about 8587.3681067018. The cubic root of 73742891 is about 419.3468513959.

The spelling of 73742891 in words is "seventy-three million, seven hundred forty-two thousand, eight hundred ninety-one".