50891669 has 4 divisors (see below), whose sum is σ = 51176160. Its totient is φ = 50607180.

The previous prime is 50891641. The next prime is 50891719. The reversal of 50891669 is 96619805.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96619805 = 5 ⋅19323961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50891669 is a prime.

It is a super-2 number, since 2×50891669² = 5179923947211122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50891069) 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 in 3 ways as a sum of consecutive naturals, for example, 141977 + ... + 142334.

It is an arithmetic number, because the mean of its divisors is an integer number (12794040).

Almost surely, 2^50891669 is an apocalyptic number.

It is an amenable number.

50891669 is a deficient number, since it is larger than the sum of its proper divisors (284491).

50891669 is a wasteful number, since it uses less digits than its factorization.

50891669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284490.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 50891669 is about 7133.8397094412. The cubic root of 50891669 is about 370.5802169983.

The spelling of 50891669 in words is "fifty million, eight hundred ninety-one thousand, six hundred sixty-nine".