47421777 has 16 divisors (see below), whose sum is σ = 71677760. Its totient is φ = 27646272.

The previous prime is 47421769. The next prime is 47421779. The reversal of 47421777 is 77712474.

47421777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47421777 - 2³ = 47421769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47421779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31258 + ... + 32739.

It is an arithmetic number, because the mean of its divisors is an integer number (4479860).

Almost surely, 2^47421777 is an apocalyptic number.

It is an amenable number.

47421777 is a deficient number, since it is larger than the sum of its proper divisors (24255983).

47421777 is a wasteful number, since it uses less digits than its factorization.

47421777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64032.

The product of its digits is 76832, while the sum is 39.

The square root of 47421777 is about 6886.3471448947. The cubic root of 47421777 is about 361.9589124434.

The spelling of 47421777 in words is "forty-seven million, four hundred twenty-one thousand, seven hundred seventy-seven".