49742591 has 4 divisors (see below), whose sum is σ = 50800992. Its totient is φ = 48684192.

The previous prime is 49742557. The next prime is 49742599. The reversal of 49742591 is 19524794.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49742591 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 (49742599) 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, 529130 + ... + 529223.

It is an arithmetic number, because the mean of its divisors is an integer number (12700248).

Almost surely, 2^49742591 is an apocalyptic number.

49742591 is a deficient number, since it is larger than the sum of its proper divisors (1058401).

49742591 is a wasteful number, since it uses less digits than its factorization.

49742591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058400.

The product of its digits is 90720, while the sum is 41.

The square root of 49742591 is about 7052.8427601925. The cubic root of 49742591 is about 367.7698599447.

The spelling of 49742591 in words is "forty-nine million, seven hundred forty-two thousand, five hundred ninety-one".