47149989 has 4 divisors (see below), whose sum is σ = 62866656. Its totient is φ = 31433324.

The previous prime is 47149987. The next prime is 47149997. The reversal of 47149989 is 98994174.

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 47149989 - 2¹ = 47149987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47149987) 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, 7858329 + ... + 7858334.

It is an arithmetic number, because the mean of its divisors is an integer number (15716664).

Almost surely, 2^47149989 is an apocalyptic number.

It is an amenable number.

47149989 is a deficient number, since it is larger than the sum of its proper divisors (15716667).

47149989 is a wasteful number, since it uses less digits than its factorization.

47149989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15716666.

The product of its digits is 653184, while the sum is 51.

The square root of 47149989 is about 6866.5849590608. The cubic root of 47149989 is about 361.2660898873.

The spelling of 47149989 in words is "forty-seven million, one hundred forty-nine thousand, nine hundred eighty-nine".