49991963 has 4 divisors (see below), whose sum is σ = 57133680. Its totient is φ = 42850248.

The previous prime is 49991927. The next prime is 49991993. The reversal of 49991963 is 36919994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36919994 = 2 ⋅18459997.

It is not a de Polignac number, because 49991963 - 2⁸ = 49991707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49991993) 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, 3570848 + ... + 3570861.

It is an arithmetic number, because the mean of its divisors is an integer number (14283420).

Almost surely, 2^49991963 is an apocalyptic number.

49991963 is a deficient number, since it is larger than the sum of its proper divisors (7141717).

49991963 is an equidigital number, since it uses as much as digits as its factorization.

49991963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7141716.

The product of its digits is 472392, while the sum is 50.

The square root of 49991963 is about 7070.4994873064. The cubic root of 49991963 is about 368.3834097656.

The spelling of 49991963 in words is "forty-nine million, nine hundred ninety-one thousand, nine hundred sixty-three".