47149889 has 4 divisors (see below), whose sum is σ = 47922900. Its totient is φ = 46376880.

The previous prime is 47149873. The next prime is 47149903. The reversal of 47149889 is 98894174.

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 4443664 + 42706225 = 2108^2 + 6535^2 .

It is a cyclic number.

It is not a de Polignac number, because 47149889 - 2⁴ = 47149873 is a prime.

It is a super-2 number, since 2×47149889² = 4446224065424642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47149829) 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, 386414 + ... + 386535.

It is an arithmetic number, because the mean of its divisors is an integer number (11980725).

Almost surely, 2^47149889 is an apocalyptic number.

It is an amenable number.

47149889 is a deficient number, since it is larger than the sum of its proper divisors (773011).

47149889 is an equidigital number, since it uses as much as digits as its factorization.

47149889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773010.

The product of its digits is 580608, while the sum is 50.

The square root of 47149889 is about 6866.5776774169. The cubic root of 47149889 is about 361.2658344851.

The spelling of 47149889 in words is "forty-seven million, one hundred forty-nine thousand, eight hundred eighty-nine".