47778397 has 8 divisors (see below), whose sum is σ = 48403616. Its totient is φ = 47157552.

The previous prime is 47778391. The next prime is 47778403. The reversal of 47778397 is 79387774.

47778397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (47778391) and next prime (47778403).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47778397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47778391) 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 7 ways as a sum of consecutive naturals, for example, 24658 + ... + 26524.

It is an arithmetic number, because the mean of its divisors is an integer number (6050452).

Almost surely, 2^47778397 is an apocalyptic number.

It is an amenable number.

47778397 is a deficient number, since it is larger than the sum of its proper divisors (625219).

47778397 is a wasteful number, since it uses less digits than its factorization.

47778397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187.

The product of its digits is 2074464, while the sum is 52.

The square root of 47778397 is about 6912.1919099516. The cubic root of 47778397 is about 362.8639787661.

The spelling of 47778397 in words is "forty-seven million, seven hundred seventy-eight thousand, three hundred ninety-seven".