405652697 has 2 divisors, whose sum is σ = 405652698. Its totient is φ = 405652696.

The previous prime is 405652651. The next prime is 405652699. The reversal of 405652697 is 796256504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302203456 + 103449241 = 17384^2 + 10171^2 .

It is a cyclic number.

It is not a de Polignac number, because 405652697 - 2¹⁸ = 405390553 is a prime.

It is a super-2 number, since 2×405652697² = 329108221166747618, which contains 22 as substring.

Together with 405652699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405652699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202826348 + 202826349.

It is an arithmetic number, because the mean of its divisors is an integer number (202826349).

Almost surely, 2^405652697 is an apocalyptic number.

It is an amenable number.

405652697 is a deficient number, since it is larger than the sum of its proper divisors (1).

405652697 is an equidigital number, since it uses as much as digits as its factorization.

405652697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 405652697 is about 20140.8216565263. The cubic root of 405652697 is about 740.2608631070.

The spelling of 405652697 in words is "four hundred five million, six hundred fifty-two thousand, six hundred ninety-seven".