405346397 has 2 divisors, whose sum is σ = 405346398. Its totient is φ = 405346396.

The previous prime is 405346391. The next prime is 405346441. The reversal of 405346397 is 793643504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405055876 + 290521 = 20126^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 405346397 - 2⁸ = 405346141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405346391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202673198 + 202673199.

It is an arithmetic number, because the mean of its divisors is an integer number (202673199).

Almost surely, 2^405346397 is an apocalyptic number.

It is an amenable number.

405346397 is a deficient number, since it is larger than the sum of its proper divisors (1).

405346397 is an equidigital number, since it uses as much as digits as its factorization.

405346397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 405346397 is about 20133.2162606971. The cubic root of 405346397 is about 740.0744976131.

The spelling of 405346397 in words is "four hundred five million, three hundred forty-six thousand, three hundred ninety-seven".