50891409 has 10 divisors (see below), whose sum is σ = 76023090. Its totient is φ = 33927552.

The previous prime is 50891389. The next prime is 50891411. The reversal of 50891409 is 90419805.

50891409 is a `hidden beast` number, since 508 + 9 + 140 + 9 = 666.

50891409 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in only one way, i.e., 47651409 + 3240000 = 6903^2 + 1800^2 .

It is not a de Polignac number, because 50891409 - 2¹¹ = 50889361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50891509) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 314064 + ... + 314225.

It is an arithmetic number, because the mean of its divisors is an integer number (7602309).

Almost surely, 2^50891409 is an apocalyptic number.

It is an amenable number.

50891409 is a deficient number, since it is larger than the sum of its proper divisors (25131681).

50891409 is an equidigital number, since it uses as much as digits as its factorization.

50891409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628301 (or 628292 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 50891409 is about 7133.8214864125. The cubic root of 50891409 is about 370.5795859126.

The spelling of 50891409 in words is "fifty million, eight hundred ninety-one thousand, four hundred nine".