50649689 has 4 divisors (see below), whose sum is σ = 52396260. Its totient is φ = 48903120.

The previous prime is 50649673. The next prime is 50649701. The reversal of 50649689 is 98694605.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29073664 + 21576025 = 5392^2 + 4645^2 .

It is a cyclic number.

It is not a de Polignac number, because 50649689 - 2⁴ = 50649673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50649619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873242 + ... + 873299.

It is an arithmetic number, because the mean of its divisors is an integer number (13099065).

Almost surely, 2^50649689 is an apocalyptic number.

It is an amenable number.

50649689 is a deficient number, since it is larger than the sum of its proper divisors (1746571).

50649689 is a wasteful number, since it uses less digits than its factorization.

50649689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746570.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 50649689 is about 7116.8594899717. The cubic root of 50649689 is about 369.9919379787.

The spelling of 50649689 in words is "fifty million, six hundred forty-nine thousand, six hundred eighty-nine".