32139473 has 2 divisors, whose sum is σ = 32139474. Its totient is φ = 32139472.

The previous prime is 32139397. The next prime is 32139539. The reversal of 32139473 is 37493123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29343889 + 2795584 = 5417^2 + 1672^2 .

It is an emirp because it is prime and its reverse (37493123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32139473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (32139973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16069736 + 16069737.

It is an arithmetic number, because the mean of its divisors is an integer number (16069737).

Almost surely, 2^32139473 is an apocalyptic number.

It is an amenable number.

32139473 is a deficient number, since it is larger than the sum of its proper divisors (1).

32139473 is an equidigital number, since it uses as much as digits as its factorization.

32139473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 32.

The square root of 32139473 is about 5669.1686339357. The cubic root of 32139473 is about 317.9407910281.

The spelling of 32139473 in words is "thirty-two million, one hundred thirty-nine thousand, four hundred seventy-three".