50499991 has 4 divisors (see below), whose sum is σ = 52241400. Its totient is φ = 48758584.

The previous prime is 50499989. The next prime is 50500001. The reversal of 50499991 is 19999405.

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 50499991 - 2¹ = 50499989 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 (50499971) 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, 870661 + ... + 870718.

It is an arithmetic number, because the mean of its divisors is an integer number (13060350).

Almost surely, 2^50499991 is an apocalyptic number.

50499991 is a deficient number, since it is larger than the sum of its proper divisors (1741409).

50499991 is a wasteful number, since it uses less digits than its factorization.

50499991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741408.

The product of its (nonzero) digits is 131220, while the sum is 46.

The square root of 50499991 is about 7106.3345685381. The cubic root of 50499991 is about 369.6270676276.

The spelling of 50499991 in words is "fifty million, four hundred ninety-nine thousand, nine hundred ninety-one".