49999819 has 2 divisors, whose sum is σ = 49999820. Its totient is φ = 49999818.

The previous prime is 49999801. The next prime is 49999843. The reversal of 49999819 is 91899994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49999819 - 2⁹ = 49999307 is a prime.

It is a super-2 number, since 2×49999819² = 4999963800065522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49999619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999909 + 24999910.

It is an arithmetic number, because the mean of its divisors is an integer number (24999910).

Almost surely, 2^49999819 is an apocalyptic number.

49999819 is a deficient number, since it is larger than the sum of its proper divisors (1).

49999819 is an equidigital number, since it uses as much as digits as its factorization.

49999819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 58.

The square root of 49999819 is about 7071.0550132212. The cubic root of 49999819 is about 368.4027053237.

The spelling of 49999819 in words is "forty-nine million, nine hundred ninety-nine thousand, eight hundred nineteen".