50861749 has 2 divisors, whose sum is σ = 50861750. Its totient is φ = 50861748.

The previous prime is 50861747. The next prime is 50861779. The reversal of 50861749 is 94716805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 10284849 = 6370^2 + 3207^2 .

It is a cyclic number.

It is not a de Polignac number, because 50861749 - 2¹ = 50861747 is a prime.

It is a super-2 number, since 2×50861749² = 5173835022678002, which contains 22 as substring.

Together with 50861747, 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 (50861743) 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, 25430874 + 25430875.

It is an arithmetic number, because the mean of its divisors is an integer number (25430875).

Almost surely, 2^50861749 is an apocalyptic number.

It is an amenable number.

50861749 is a deficient number, since it is larger than the sum of its proper divisors (1).

50861749 is an equidigital number, since it uses as much as digits as its factorization.

50861749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 50861749 is about 7131.7423537310. The cubic root of 50861749 is about 370.5075794795.

The spelling of 50861749 in words is "fifty million, eight hundred sixty-one thousand, seven hundred forty-nine".