47645257 has 8 divisors (see below), whose sum is σ = 52208352. Its totient is φ = 43120800.

The previous prime is 47645249. The next prime is 47645287. The reversal of 47645257 is 75254674.

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

It is a cyclic number.

It is not a de Polignac number, because 47645257 - 2³ = 47645249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47645287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7044 + ... + 12037.

It is an arithmetic number, because the mean of its divisors is an integer number (6526044).

Almost surely, 2^47645257 is an apocalyptic number.

It is an amenable number.

47645257 is a deficient number, since it is larger than the sum of its proper divisors (4563095).

47645257 is a wasteful number, since it uses less digits than its factorization.

47645257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19319.

The product of its digits is 235200, while the sum is 40.

The square root of 47645257 is about 6902.5543822559. The cubic root of 47645257 is about 362.5266111261.

The spelling of 47645257 in words is "forty-seven million, six hundred forty-five thousand, two hundred fifty-seven".