40208797 has 2 divisors, whose sum is σ = 40208798. Its totient is φ = 40208796.

The previous prime is 40208789. The next prime is 40208803. The reversal of 40208797 is 79780204.

It is a happy number.

40208797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35928036 + 4280761 = 5994^2 + 2069^2 .

It is a cyclic number.

It is not a de Polignac number, because 40208797 - 2³ = 40208789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40208197) 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, 20104398 + 20104399.

It is an arithmetic number, because the mean of its divisors is an integer number (20104399).

Almost surely, 2^40208797 is an apocalyptic number.

It is an amenable number.

40208797 is a deficient number, since it is larger than the sum of its proper divisors (1).

40208797 is an equidigital number, since it uses as much as digits as its factorization.

40208797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 40208797 is about 6341.0406874582. The cubic root of 40208797 is about 342.5892200122.

The spelling of 40208797 in words is "forty million, two hundred eight thousand, seven hundred ninety-seven".