48491993 has 4 divisors (see below), whose sum is σ = 52900368. Its totient is φ = 44083620.

The previous prime is 48491977. The next prime is 48491999. The reversal of 48491993 is 39919484.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 48491993 - 2⁴ = 48491977 is a prime.

It is a super-2 number, since 2×48491993² = 4702946770224098, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (48491999) 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, 2204171 + ... + 2204192.

It is an arithmetic number, because the mean of its divisors is an integer number (13225092).

Almost surely, 2^48491993 is an apocalyptic number.

It is an amenable number.

48491993 is a deficient number, since it is larger than the sum of its proper divisors (4408375).

48491993 is a wasteful number, since it uses less digits than its factorization.

48491993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408374.

The product of its digits is 279936, while the sum is 47.

The square root of 48491993 is about 6963.6192457658. The cubic root of 48491993 is about 364.6615816143.

The spelling of 48491993 in words is "forty-eight million, four hundred ninety-one thousand, nine hundred ninety-three".