50121649 has 4 divisors (see below), whose sum is σ = 50152180. Its totient is φ = 50091120.

The previous prime is 50121641. The next prime is 50121653. The reversal of 50121649 is 94612105.

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 17139600 + 32982049 = 4140^2 + 5743^2 .

It is a cyclic number.

It is not a de Polignac number, because 50121649 - 2³ = 50121641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50121641) 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, 12654 + ... + 16135.

It is an arithmetic number, because the mean of its divisors is an integer number (12538045).

Almost surely, 2^50121649 is an apocalyptic number.

It is an amenable number.

50121649 is a deficient number, since it is larger than the sum of its proper divisors (30531).

50121649 is a wasteful number, since it uses less digits than its factorization.

50121649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30530.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 50121649 is about 7079.6644694505. The cubic root of 50121649 is about 368.7016803870.

The spelling of 50121649 in words is "fifty million, one hundred twenty-one thousand, six hundred forty-nine".