48991871 has 2 divisors, whose sum is σ = 48991872. Its totient is φ = 48991870.

The previous prime is 48991867. The next prime is 48991883. The reversal of 48991871 is 17819984.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 48991871 - 2² = 48991867 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48991571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24495935 + 24495936.

It is an arithmetic number, because the mean of its divisors is an integer number (24495936).

Almost surely, 2^48991871 is an apocalyptic number.

48991871 is a deficient number, since it is larger than the sum of its proper divisors (1).

48991871 is an equidigital number, since it uses as much as digits as its factorization.

48991871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 47.

The square root of 48991871 is about 6999.4193330590. The cubic root of 48991871 is about 365.9103341715.

The spelling of 48991871 in words is "forty-eight million, nine hundred ninety-one thousand, eight hundred seventy-one".