48720209 has 2 divisors, whose sum is σ = 48720210. Its totient is φ = 48720208.

The previous prime is 48720193. The next prime is 48720239. The reversal of 48720209 is 90202784.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28944400 + 19775809 = 5380^2 + 4447^2 .

It is a cyclic number.

It is not a de Polignac number, because 48720209 - 2⁴ = 48720193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (48720239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24360104 + 24360105.

It is an arithmetic number, because the mean of its divisors is an integer number (24360105).

Almost surely, 2^48720209 is an apocalyptic number.

It is an amenable number.

48720209 is a deficient number, since it is larger than the sum of its proper divisors (1).

48720209 is an equidigital number, since it uses as much as digits as its factorization.

48720209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 48720209 is about 6979.9863180382. The cubic root of 48720209 is about 365.2327507801.

It can be divided in two parts, 4 and 8720209, that multiplied together give a square (34880836 = 5906²).

The spelling of 48720209 in words is "forty-eight million, seven hundred twenty thousand, two hundred nine".