47645247 has 16 divisors (see below), whose sum is σ = 70007168. Its totient is φ = 28637280.

The previous prime is 47645219. The next prime is 47645249. The reversal of 47645247 is 74254674.

It is not a de Polignac number, because 47645247 - 2⁶ = 47645183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47645249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12529 + ... + 15882.

It is an arithmetic number, because the mean of its divisors is an integer number (4375448).

Almost surely, 2^47645247 is an apocalyptic number.

47645247 is a deficient number, since it is larger than the sum of its proper divisors (22361921).

47645247 is a wasteful number, since it uses less digits than its factorization.

47645247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28470.

The product of its digits is 188160, while the sum is 39.

The square root of 47645247 is about 6902.5536578863. The cubic root of 47645247 is about 362.5265857632.

It can be divided in two parts, 4764 and 5247, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 47645247 in words is "forty-seven million, six hundred forty-five thousand, two hundred forty-seven".