49188809 has 2 divisors, whose sum is σ = 49188810. Its totient is φ = 49188808.

The previous prime is 49188793. The next prime is 49188817. The reversal of 49188809 is 90888194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46854025 + 2334784 = 6845^2 + 1528^2 .

It is a cyclic number.

It is not a de Polignac number, because 49188809 - 2⁴ = 49188793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49188859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24594404 + 24594405.

It is an arithmetic number, because the mean of its divisors is an integer number (24594405).

Almost surely, 2^49188809 is an apocalyptic number.

It is an amenable number.

49188809 is a deficient number, since it is larger than the sum of its proper divisors (1).

49188809 is an equidigital number, since it uses as much as digits as its factorization.

49188809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 49188809 is about 7013.4733905534. The cubic root of 49188809 is about 366.3999753096.

The spelling of 49188809 in words is "forty-nine million, one hundred eighty-eight thousand, eight hundred nine".