47491249 has 4 divisors (see below), whose sum is σ = 51144436. Its totient is φ = 43838064.

The previous prime is 47491237. The next prime is 47491253. The reversal of 47491249 is 94219474.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4129024 + 43362225 = 2032^2 + 6585^2 .

It is a cyclic number.

It is not a de Polignac number, because 47491249 - 2⁷ = 47491121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47491259) 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, 1826574 + ... + 1826599.

It is an arithmetic number, because the mean of its divisors is an integer number (12786109).

Almost surely, 2^47491249 is an apocalyptic number.

It is an amenable number.

47491249 is a deficient number, since it is larger than the sum of its proper divisors (3653187).

47491249 is a wasteful number, since it uses less digits than its factorization.

47491249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3653186.

The product of its digits is 72576, while the sum is 40.

The square root of 47491249 is about 6891.3894825354. The cubic root of 47491249 is about 362.1355805037.

The spelling of 47491249 in words is "forty-seven million, four hundred ninety-one thousand, two hundred forty-nine".