47155749 has 8 divisors (see below), whose sum is σ = 63222432. Its totient is φ = 31263120.

The previous prime is 47155741. The next prime is 47155751. The reversal of 47155749 is 94755174.

47155749 = 2285² + 2286² + ... + 2293².

It is a happy number.

47155749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 47155749 - 2³ = 47155741 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 47155749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47155741) 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, 42879 + ... + 43964.

It is an arithmetic number, because the mean of its divisors is an integer number (7902804).

Almost surely, 2^47155749 is an apocalyptic number.

It is an amenable number.

47155749 is a deficient number, since it is larger than the sum of its proper divisors (16066683).

47155749 is a wasteful number, since it uses less digits than its factorization.

47155749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87027.

The product of its digits is 176400, while the sum is 42.

The square root of 47155749 is about 6867.0043687186. The cubic root of 47155749 is about 361.2808004453.

The spelling of 47155749 in words is "forty-seven million, one hundred fifty-five thousand, seven hundred forty-nine".