50649986 has 4 divisors (see below), whose sum is σ = 75974982. Its totient is φ = 25324992.

The previous prime is 50649983. The next prime is 50650007. The reversal of 50649986 is 68994605.

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

It can be written as a sum of positive squares in only one way, i.e., 25959025 + 24690961 = 5095^2 + 4969^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 50649986.

It is not an unprimeable number, because it can be changed into a prime (50649983) 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 as a sum of consecutive naturals, namely, 12662495 + ... + 12662498.

Almost surely, 2^50649986 is an apocalyptic number.

50649986 is a deficient number, since it is larger than the sum of its proper divisors (25324996).

50649986 is a wasteful number, since it uses less digits than its factorization.

50649986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25324995.

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

The square root of 50649986 is about 7116.8803558863. The cubic root of 50649986 is about 369.9926611644.

The spelling of 50649986 in words is "fifty million, six hundred forty-nine thousand, nine hundred eighty-six".