47777799 has 8 divisors (see below), whose sum is σ = 67056640. Its totient is φ = 30175416.

The previous prime is 47777797. The next prime is 47777801. The reversal of 47777799 is 99777774.

It is an interprime number because it is at equal distance from previous prime (47777797) and next prime (47777801).

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

It is not a de Polignac number, because 47777799 - 2¹ = 47777797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 838207 = 47777799 / (4 + 7 + 7 + 7 + 7 + 7 + 9 + 9).

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47777797) 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, 419047 + ... + 419160.

It is an arithmetic number, because the mean of its divisors is an integer number (8382080).

Almost surely, 2^47777799 is an apocalyptic number.

47777799 is a deficient number, since it is larger than the sum of its proper divisors (19278841).

47777799 is a wasteful number, since it uses less digits than its factorization.

47777799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838229.

The product of its digits is 5445468, while the sum is 57.

The square root of 47777799 is about 6912.1486529154. The cubic root of 47777799 is about 362.8624648771.

The spelling of 47777799 in words is "forty-seven million, seven hundred seventy-seven thousand, seven hundred ninety-nine".