48638209 has 2 divisors, whose sum is σ = 48638210. Its totient is φ = 48638208.

The previous prime is 48638189. The next prime is 48638231. The reversal of 48638209 is 90283684.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40640625 + 7997584 = 6375^2 + 2828^2 .

It is a cyclic number.

It is not a de Polignac number, because 48638209 - 2¹⁹ = 48113921 is a prime.

It is not a weakly prime, because it can be changed into another prime (48638269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24319104 + 24319105.

It is an arithmetic number, because the mean of its divisors is an integer number (24319105).

Almost surely, 2^48638209 is an apocalyptic number.

It is an amenable number.

48638209 is a deficient number, since it is larger than the sum of its proper divisors (1).

48638209 is an equidigital number, since it uses as much as digits as its factorization.

48638209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 48638209 is about 6974.1099073645. The cubic root of 48638209 is about 365.0277304258.

The spelling of 48638209 in words is "forty-eight million, six hundred thirty-eight thousand, two hundred nine".