50626991 has 2 divisors, whose sum is σ = 50626992. Its totient is φ = 50626990.

The previous prime is 50626973. The next prime is 50627029. The reversal of 50626991 is 19962605.

It is an a-pointer prime, because the next prime (50627029) can be obtained adding 50626991 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50626991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50626931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25313495 + 25313496.

It is an arithmetic number, because the mean of its divisors is an integer number (25313496).

Almost surely, 2^50626991 is an apocalyptic number.

50626991 is a deficient number, since it is larger than the sum of its proper divisors (1).

50626991 is an equidigital number, since it uses as much as digits as its factorization.

50626991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 50626991 is about 7115.2646472215. The cubic root of 50626991 is about 369.9366606941.

Subtracting from 50626991 its sum of digits (38), we obtain a triangular number (50626953 = T₁₀₀₆₂).

The spelling of 50626991 in words is "fifty million, six hundred twenty-six thousand, nine hundred ninety-one".