50561839 has 2 divisors, whose sum is σ = 50561840. Its totient is φ = 50561838.

The previous prime is 50561821. The next prime is 50561867. The reversal of 50561839 is 93816505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50561839 - 2¹³ = 50553647 is a prime.

It is a super-3 number, since 3×50561839³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 50561798 and 50561807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50561039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25280919 + 25280920.

It is an arithmetic number, because the mean of its divisors is an integer number (25280920).

Almost surely, 2^50561839 is an apocalyptic number.

50561839 is a deficient number, since it is larger than the sum of its proper divisors (1).

50561839 is an equidigital number, since it uses as much as digits as its factorization.

50561839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 50561839 is about 7110.6848474672. The cubic root of 50561839 is about 369.7779017709. Note that the first 3 decimals are identical.

The spelling of 50561839 in words is "fifty million, five hundred sixty-one thousand, eight hundred thirty-nine".