50561689 has 8 divisors (see below), whose sum is σ = 53676648. Its totient is φ = 47462400.

The previous prime is 50561683. The next prime is 50561759. The reversal of 50561689 is 98616505.

It can be written as a sum of positive squares in 4 ways, for example, as 38192400 + 12369289 = 6180^2 + 3517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50561689 - 2⁵ = 50561657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50561683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3109 + ... + 10525.

It is an arithmetic number, because the mean of its divisors is an integer number (6709581).

Almost surely, 2^50561689 is an apocalyptic number.

It is an amenable number.

50561689 is a deficient number, since it is larger than the sum of its proper divisors (3114959).

50561689 is a wasteful number, since it uses less digits than its factorization.

50561689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7835.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 50561689 is about 7110.6742999522. The cubic root of 50561689 is about 369.7775361015. Note that the first 3 decimals are identical.

The spelling of 50561689 in words is "fifty million, five hundred sixty-one thousand, six hundred eighty-nine".