406681523 has 2 divisors, whose sum is σ = 406681524. Its totient is φ = 406681522.

The previous prime is 406681511. The next prime is 406681549. The reversal of 406681523 is 325186604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406681523 - 2⁸ = 406681267 is a prime.

It is a super-2 number, since 2×406681523² = 330779722299199058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (406680523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203340761 + 203340762.

It is an arithmetic number, because the mean of its divisors is an integer number (203340762).

Almost surely, 2^406681523 is an apocalyptic number.

406681523 is a deficient number, since it is larger than the sum of its proper divisors (1).

406681523 is an equidigital number, since it uses as much as digits as its factorization.

406681523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 406681523 is about 20166.3462977308. The cubic root of 406681523 is about 740.8861571674.

The spelling of 406681523 in words is "four hundred six million, six hundred eighty-one thousand, five hundred twenty-three".