49999663 has 4 divisors (see below), whose sum is σ = 57142480. Its totient is φ = 42856848.

The previous prime is 49999643. The next prime is 49999667. The reversal of 49999663 is 36699994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36699994 = 2 ⋅18349997.

It is a cyclic number.

It is not a de Polignac number, because 49999663 - 2⁹ = 49999151 is a prime.

It is a super-2 number, since 2×49999663² = 4999932600227138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3571398 + ... + 3571411.

It is an arithmetic number, because the mean of its divisors is an integer number (14285620).

Almost surely, 2^49999663 is an apocalyptic number.

49999663 is a deficient number, since it is larger than the sum of its proper divisors (7142817).

49999663 is an equidigital number, since it uses as much as digits as its factorization.

49999663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7142816.

The product of its digits is 2834352, while the sum is 55.

The square root of 49999663 is about 7071.0439823268. The cubic root of 49999663 is about 368.4023221831.

The spelling of 49999663 in words is "forty-nine million, nine hundred ninety-nine thousand, six hundred sixty-three".