47489813 has 4 divisors (see below), whose sum is σ = 54274080. Its totient is φ = 40705548.

The previous prime is 47489809. The next prime is 47489839. The reversal of 47489813 is 31898474.

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 a cyclic number.

It is not a de Polignac number, because 47489813 - 2² = 47489809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47489803) 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, 3392123 + ... + 3392136.

It is an arithmetic number, because the mean of its divisors is an integer number (13568520).

Almost surely, 2^47489813 is an apocalyptic number.

It is an amenable number.

47489813 is a deficient number, since it is larger than the sum of its proper divisors (6784267).

47489813 is an equidigital number, since it uses as much as digits as its factorization.

47489813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6784266.

The product of its digits is 193536, while the sum is 44.

The square root of 47489813 is about 6891.2852937605. The cubic root of 47489813 is about 362.1319304843.

The spelling of 47489813 in words is "forty-seven million, four hundred eighty-nine thousand, eight hundred thirteen".