40432397 has 2 divisors, whose sum is σ = 40432398. Its totient is φ = 40432396.

The previous prime is 40432373. The next prime is 40432489. The reversal of 40432397 is 79323404.

40432397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27573001 + 12859396 = 5251^2 + 3586^2 .

It is a cyclic number.

It is not a de Polignac number, because 40432397 - 2⁶ = 40432333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40432097) 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, 20216198 + 20216199.

It is an arithmetic number, because the mean of its divisors is an integer number (20216199).

Almost surely, 2^40432397 is an apocalyptic number.

It is an amenable number.

40432397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40432397 is an equidigital number, since it uses as much as digits as its factorization.

40432397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 40432397 is about 6358.6474190664. The cubic root of 40432397 is about 343.2230895196.

The spelling of 40432397 in words is "forty million, four hundred thirty-two thousand, three hundred ninety-seven".