47869257 has 4 divisors (see below), whose sum is σ = 63825680. Its totient is φ = 31912836.

The previous prime is 47869249. The next prime is 47869259. The reversal of 47869257 is 75296874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 47869257 - 2³ = 47869249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47869259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7978207 + ... + 7978212.

It is an arithmetic number, because the mean of its divisors is an integer number (15956420).

Almost surely, 2^47869257 is an apocalyptic number.

It is an amenable number.

47869257 is a deficient number, since it is larger than the sum of its proper divisors (15956423).

47869257 is a wasteful number, since it uses less digits than its factorization.

47869257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15956422.

The product of its digits is 846720, while the sum is 48.

The square root of 47869257 is about 6918.7612330532. The cubic root of 47869257 is about 363.0938521378.

The spelling of 47869257 in words is "forty-seven million, eight hundred sixty-nine thousand, two hundred fifty-seven".