47378911 has 4 divisors (see below), whose sum is σ = 47550232. Its totient is φ = 47207592.

The previous prime is 47378909. The next prime is 47378917. The reversal of 47378911 is 11987374.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47378911 - 2¹ = 47378909 is a prime.

It is a super-2 number, since 2×47378911² = 4489522415091842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47378917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85245 + ... + 85798.

It is an arithmetic number, because the mean of its divisors is an integer number (11887558).

Almost surely, 2^47378911 is an apocalyptic number.

47378911 is a deficient number, since it is larger than the sum of its proper divisors (171321).

47378911 is a wasteful number, since it uses less digits than its factorization.

47378911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171320.

The product of its digits is 42336, while the sum is 40.

The square root of 47378911 is about 6883.2340509386. The cubic root of 47378911 is about 361.8498176412.

The spelling of 47378911 in words is "forty-seven million, three hundred seventy-eight thousand, nine hundred eleven".