405697613 has 2 divisors, whose sum is σ = 405697614. Its totient is φ = 405697612.

The previous prime is 405697601. The next prime is 405697631. The reversal of 405697613 is 316796504.

405697613 = 14242² + 14243².

Together with next prime (405697631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202863049 + 202834564 = 14243^2 + 14242^2 .

It is a cyclic number.

It is not a de Polignac number, because 405697613 - 2⁶ = 405697549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405697693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202848806 + 202848807.

It is an arithmetic number, because the mean of its divisors is an integer number (202848807).

Almost surely, 2^405697613 is an apocalyptic number.

405697613 is the 14243-rd centered square number.

It is an amenable number.

405697613 is a deficient number, since it is larger than the sum of its proper divisors (1).

405697613 is an equidigital number, since it uses as much as digits as its factorization.

405697613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 405697613 is about 20141.9366745107. The cubic root of 405697613 is about 740.2881839573.

The spelling of 405697613 in words is "four hundred five million, six hundred ninety-seven thousand, six hundred thirteen".