406688651 has 2 divisors, whose sum is σ = 406688652. Its totient is φ = 406688650.

The previous prime is 406688627. The next prime is 406688669. The reversal of 406688651 is 156886604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406688651 - 2¹⁰ = 406687627 is a prime.

It is not a weakly prime, because it can be changed into another prime (406688251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203344325 + 203344326.

It is an arithmetic number, because the mean of its divisors is an integer number (203344326).

Almost surely, 2^406688651 is an apocalyptic number.

406688651 is a deficient number, since it is larger than the sum of its proper divisors (1).

406688651 is an equidigital number, since it uses as much as digits as its factorization.

406688651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 406688651 is about 20166.5230270367. The cubic root of 406688651 is about 740.8904857025.

The spelling of 406688651 in words is "four hundred six million, six hundred eighty-eight thousand, six hundred fifty-one".