406627321 has 2 divisors, whose sum is σ = 406627322. Its totient is φ = 406627320.

The previous prime is 406627297. The next prime is 406627337. The reversal of 406627321 is 123726604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354945600 + 51681721 = 18840^2 + 7189^2 .

It is a cyclic number.

It is not a de Polignac number, because 406627321 - 2¹¹ = 406625273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406607321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203313660 + 203313661.

It is an arithmetic number, because the mean of its divisors is an integer number (203313661).

Almost surely, 2^406627321 is an apocalyptic number.

It is an amenable number.

406627321 is a deficient number, since it is larger than the sum of its proper divisors (1).

406627321 is an equidigital number, since it uses as much as digits as its factorization.

406627321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 406627321 is about 20165.0023803619. The cubic root of 406627321 is about 740.8532409145.

The spelling of 406627321 in words is "four hundred six million, six hundred twenty-seven thousand, three hundred twenty-one".