49980991 has 2 divisors, whose sum is σ = 49980992. Its totient is φ = 49980990.

The previous prime is 49980989. The next prime is 49981079. The reversal of 49980991 is 19908994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49980991 - 2¹ = 49980989 is a prime.

It is a super-3 number, since 3×49980991³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 49980989, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49980971) 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, 24990495 + 24990496.

It is an arithmetic number, because the mean of its divisors is an integer number (24990496).

Almost surely, 2^49980991 is an apocalyptic number.

49980991 is a deficient number, since it is larger than the sum of its proper divisors (1).

49980991 is an equidigital number, since it uses as much as digits as its factorization.

49980991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 49980991 is about 7069.7235448071. The cubic root of 49980991 is about 368.3564574432.

The spelling of 49980991 in words is "forty-nine million, nine hundred eighty thousand, nine hundred ninety-one".