50978749 has 2 divisors, whose sum is σ = 50978750. Its totient is φ = 50978748.

The previous prime is 50978743. The next prime is 50978783. The reversal of 50978749 is 94787905.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50268100 + 710649 = 7090^2 + 843^2 .

It is a cyclic number.

It is not a de Polignac number, because 50978749 - 2⁹ = 50978237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50978743) 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, 25489374 + 25489375.

It is an arithmetic number, because the mean of its divisors is an integer number (25489375).

Almost surely, 2^50978749 is an apocalyptic number.

It is an amenable number.

50978749 is a deficient number, since it is larger than the sum of its proper divisors (1).

50978749 is an equidigital number, since it uses as much as digits as its factorization.

50978749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 50978749 is about 7139.9404059138. The cubic root of 50978749 is about 370.7914613779.

The spelling of 50978749 in words is "fifty million, nine hundred seventy-eight thousand, seven hundred forty-nine".