47431389 has 8 divisors (see below), whose sum is σ = 63306880. Its totient is φ = 31588416.

The previous prime is 47431381. The next prime is 47431399. The reversal of 47431389 is 98313474.

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

It is not a de Polignac number, because 47431389 - 2³ = 47431381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47431381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4492 + ... + 10725.

It is an arithmetic number, because the mean of its divisors is an integer number (7913360).

Almost surely, 2^47431389 is an apocalyptic number.

It is an amenable number.

47431389 is a deficient number, since it is larger than the sum of its proper divisors (15875491).

47431389 is a wasteful number, since it uses less digits than its factorization.

47431389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16259.

The product of its digits is 72576, while the sum is 39.

The square root of 47431389 is about 6887.0450121950. The cubic root of 47431389 is about 361.9833661455.

The spelling of 47431389 in words is "forty-seven million, four hundred thirty-one thousand, three hundred eighty-nine".