47090 has 16 divisors (see below), whose sum is σ = 90072. Its totient is φ = 17664.

The previous prime is 47087. The next prime is 47093. The reversal of 47090 is 9074.

It is a Cunningham number, because it is equal to 217²+1.

It is an interprime number because it is at equal distance from previous prime (47087) and next prime (47093).

It can be written as a sum of positive squares in 4 ways, for example, as 36481 + 10609 = 191^2 + 103^2 .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 47090.

It is not an unprimeable number, because it can be changed into a prime (47093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32 + ... + 308.

2⁴⁷⁰⁹⁰ is an apocalyptic number.

47090 is a deficient number, since it is larger than the sum of its proper divisors (42982).

47090 is a wasteful number, since it uses less digits than its factorization.

47090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 47090 is about 217.0023041352. The cubic root of 47090 is about 36.1112811739. Note that the first 3 decimals are identical.

The spelling of 47090 in words is "forty-seven thousand, ninety".