50386981 has 4 divisors (see below), whose sum is σ = 50885964. Its totient is φ = 49888000.

The previous prime is 50386967. The next prime is 50387021. The reversal of 50386981 is 18968305.

It is a happy number.

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 43678881 + 6708100 = 6609^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 50386981 - 2¹¹ = 50384933 is a prime.

It is a super-2 number, since 2×50386981² = 5077695708588722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50386681) by changing a digit.

It is a nontrivial repunit in base 84.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249340 + ... + 249541.

It is an arithmetic number, because the mean of its divisors is an integer number (12721491).

Almost surely, 2^50386981 is an apocalyptic number.

It is an amenable number.

50386981 is a deficient number, since it is larger than the sum of its proper divisors (498983).

50386981 is a wasteful number, since it uses less digits than its factorization.

50386981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498982.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 50386981 is about 7098.3787585617. The cubic root of 50386981 is about 369.3511418173.

The spelling of 50386981 in words is "fifty million, three hundred eighty-six thousand, nine hundred eighty-one".