240405197 has 2 divisors, whose sum is σ = 240405198. Its totient is φ = 240405196.

The previous prime is 240405163. The next prime is 240405199. The reversal of 240405197 is 791504042.

It is a happy number.

240405197 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., 128278276 + 112126921 = 11326^2 + 10589^2 .

It is a cyclic number.

It is not a de Polignac number, because 240405197 - 2¹⁶ = 240339661 is a prime.

Together with 240405199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240405199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120202598 + 120202599.

It is an arithmetic number, because the mean of its divisors is an integer number (120202599).

Almost surely, 2^240405197 is an apocalyptic number.

It is an amenable number.

240405197 is a deficient number, since it is larger than the sum of its proper divisors (1).

240405197 is an equidigital number, since it uses as much as digits as its factorization.

240405197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 240405197 is about 15505.0055465969. The cubic root of 240405197 is about 621.7960382459.

The spelling of 240405197 in words is "two hundred forty million, four hundred five thousand, one hundred ninety-seven".