32400397 has 2 divisors, whose sum is σ = 32400398. Its totient is φ = 32400396.

The previous prime is 32400341. The next prime is 32400409. The reversal of 32400397 is 79300423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25918281 + 6482116 = 5091^2 + 2546^2 .

It is a cyclic number.

It is not a de Polignac number, because 32400397 - 2¹⁹ = 31876109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35400397) 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, 16200198 + 16200199.

It is an arithmetic number, because the mean of its divisors is an integer number (16200199).

Almost surely, 2^32400397 is an apocalyptic number.

It is an amenable number.

32400397 is a deficient number, since it is larger than the sum of its proper divisors (1).

32400397 is an equidigital number, since it uses as much as digits as its factorization.

32400397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 32400397 is about 5692.1346610916. The cubic root of 32400397 is about 318.7988728342.

The spelling of 32400397 in words is "thirty-two million, four hundred thousand, three hundred ninety-seven".