48147821 has 2 divisors, whose sum is σ = 48147822. Its totient is φ = 48147820.

The previous prime is 48147773. The next prime is 48147823. The reversal of 48147821 is 12874184.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40386025 + 7761796 = 6355^2 + 2786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48147821 is a prime.

It is a Sophie Germain prime.

Together with 48147823, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48147823) 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 as a sum of consecutive naturals, namely, 24073910 + 24073911.

It is an arithmetic number, because the mean of its divisors is an integer number (24073911).

Almost surely, 2^48147821 is an apocalyptic number.

It is an amenable number.

48147821 is a deficient number, since it is larger than the sum of its proper divisors (1).

48147821 is an equidigital number, since it uses as much as digits as its factorization.

48147821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14336, while the sum is 35.

The square root of 48147821 is about 6938.8630913140. The cubic root of 48147821 is about 363.7968037302.

The spelling of 48147821 in words is "forty-eight million, one hundred forty-seven thousand, eight hundred twenty-one".