47963991 has 16 divisors (see below), whose sum is σ = 65704320. Its totient is φ = 31111200.

The previous prime is 47963989. The next prime is 47964001. The reversal of 47963991 is 19936974.

It is not a de Polignac number, because 47963991 - 2¹ = 47963989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47963991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47962991) 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 15 ways as a sum of consecutive naturals, for example, 16536 + ... + 19218.

It is an arithmetic number, because the mean of its divisors is an integer number (4106520).

Almost surely, 2^47963991 is an apocalyptic number.

47963991 is a deficient number, since it is larger than the sum of its proper divisors (17740329).

47963991 is a wasteful number, since it uses less digits than its factorization.

47963991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846.

The product of its digits is 367416, while the sum is 48.

The square root of 47963991 is about 6925.6040169793. The cubic root of 47963991 is about 363.3332170879. Note that the first 3 decimals are identical.

The spelling of 47963991 in words is "forty-seven million, nine hundred sixty-three thousand, nine hundred ninety-one".