32505397 has 2 divisors, whose sum is σ = 32505398. Its totient is φ = 32505396.

The previous prime is 32505383. The next prime is 32505413. The reversal of 32505397 is 79350523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22714756 + 9790641 = 4766^2 + 3129^2 .

It is a cyclic number.

It is not a de Polignac number, because 32505397 - 2¹¹ = 32503349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32505307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16252698 + 16252699.

It is an arithmetic number, because the mean of its divisors is an integer number (16252699).

Almost surely, 2^32505397 is an apocalyptic number.

32505397 is the 3048-th centered heptagonal number.

It is an amenable number.

32505397 is a deficient number, since it is larger than the sum of its proper divisors (1).

32505397 is an equidigital number, since it uses as much as digits as its factorization.

32505397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28350, while the sum is 34.

The square root of 32505397 is about 5701.3504540591. The cubic root of 32505397 is about 319.1428787733.

The spelling of 32505397 in words is "thirty-two million, five hundred five thousand, three hundred ninety-seven".