48243991 has 4 divisors (see below), whose sum is σ = 48523032. Its totient is φ = 47964952.

The previous prime is 48243989. The next prime is 48243997. The reversal of 48243991 is 19934284.

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 48243991 - 2¹ = 48243989 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 (48243997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139261 + ... + 139606.

It is an arithmetic number, because the mean of its divisors is an integer number (12130758).

Almost surely, 2^48243991 is an apocalyptic number.

48243991 is a deficient number, since it is larger than the sum of its proper divisors (279041).

48243991 is a wasteful number, since it uses less digits than its factorization.

48243991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279040.

The product of its digits is 62208, while the sum is 40.

The square root of 48243991 is about 6945.7894439725. The cubic root of 48243991 is about 364.0388574023.

The spelling of 48243991 in words is "forty-eight million, two hundred forty-three thousand, nine hundred ninety-one".