115448209 has 2 divisors, whose sum is σ = 115448210. Its totient is φ = 115448208.

The previous prime is 115448197. The next prime is 115448213. The reversal of 115448209 is 902844511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59721984 + 55726225 = 7728^2 + 7465^2 .

It is a cyclic number.

It is not a de Polignac number, because 115448209 - 2²¹ = 113351057 is a prime.

It is a super-2 number, since 2×115448209² = 26656577922615362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (115448299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57724104 + 57724105.

It is an arithmetic number, because the mean of its divisors is an integer number (57724105).

Almost surely, 2^115448209 is an apocalyptic number.

It is an amenable number.

115448209 is a deficient number, since it is larger than the sum of its proper divisors (1).

115448209 is an equidigital number, since it uses as much as digits as its factorization.

115448209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 115448209 is about 10744.6828245416. The cubic root of 115448209 is about 486.9253666688.

The spelling of 115448209 in words is "one hundred fifteen million, four hundred forty-eight thousand, two hundred nine".