47213777 has 8 divisors (see below), whose sum is σ = 53836776. Its totient is φ = 41018112.

The previous prime is 47213731. The next prime is 47213791. The reversal of 47213777 is 77731274.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6713281 + 40500496 = 2591^2 + 6364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47213777 - 2¹⁴ = 47197393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47213777.

It is not an unprimeable number, because it can be changed into a prime (47213707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106598 + ... + 107039.

It is an arithmetic number, because the mean of its divisors is an integer number (6729597).

Almost surely, 2^47213777 is an apocalyptic number.

It is an amenable number.

47213777 is a deficient number, since it is larger than the sum of its proper divisors (6622999).

47213777 is a wasteful number, since it uses less digits than its factorization.

47213777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213667.

The product of its digits is 57624, while the sum is 38.

The square root of 47213777 is about 6871.2282017118. The cubic root of 47213777 is about 361.4289323224.

The spelling of 47213777 in words is "forty-seven million, two hundred thirteen thousand, seven hundred seventy-seven".