48686821 has 2 divisors, whose sum is σ = 48686822. Its totient is φ = 48686820.

The previous prime is 48686767. The next prime is 48686881. The reversal of 48686821 is 12868684.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40768225 + 7918596 = 6385^2 + 2814^2 .

It is a cyclic number.

It is not a de Polignac number, because 48686821 - 2²³ = 40298213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48686881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24343410 + 24343411.

It is an arithmetic number, because the mean of its divisors is an integer number (24343411).

Almost surely, 2^48686821 is an apocalyptic number.

It is an amenable number.

48686821 is a deficient number, since it is larger than the sum of its proper divisors (1).

48686821 is an equidigital number, since it uses as much as digits as its factorization.

48686821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147456, while the sum is 43.

The square root of 48686821 is about 6977.5942129075. The cubic root of 48686821 is about 365.1493002777.

The spelling of 48686821 in words is "forty-eight million, six hundred eighty-six thousand, eight hundred twenty-one".