49977209 has 2 divisors, whose sum is σ = 49977210. Its totient is φ = 49977208.

The previous prime is 49977203. The next prime is 49977211. The reversal of 49977209 is 90277994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43191184 + 6786025 = 6572^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 49977209 - 2¹² = 49973113 is a prime.

Together with 49977211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49977203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24988604 + 24988605.

It is an arithmetic number, because the mean of its divisors is an integer number (24988605).

Almost surely, 2^49977209 is an apocalyptic number.

It is an amenable number.

49977209 is a deficient number, since it is larger than the sum of its proper divisors (1).

49977209 is an equidigital number, since it uses as much as digits as its factorization.

49977209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 49977209 is about 7069.4560611125. The cubic root of 49977209 is about 368.3471661824.

The spelling of 49977209 in words is "forty-nine million, nine hundred seventy-seven thousand, two hundred nine".