32904013 has 2 divisors, whose sum is σ = 32904014. Its totient is φ = 32904012.

The previous prime is 32903977. The next prime is 32904019. The reversal of 32904013 is 31040923.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32228329 + 675684 = 5677^2 + 822^2 .

It is an emirp because it is prime and its reverse (31040923) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32904013 - 2¹⁷ = 32772941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32904019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16452006 + 16452007.

It is an arithmetic number, because the mean of its divisors is an integer number (16452007).

Almost surely, 2^32904013 is an apocalyptic number.

It is an amenable number.

32904013 is a deficient number, since it is larger than the sum of its proper divisors (1).

32904013 is an equidigital number, since it uses as much as digits as its factorization.

32904013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 32904013 is about 5736.2019664583. The cubic root of 32904013 is about 320.4421394718.

Adding to 32904013 its reverse (31040923), we get a palindrome (63944936).

The spelling of 32904013 in words is "thirty-two million, nine hundred four thousand, thirteen".