406399933 has 2 divisors, whose sum is σ = 406399934. Its totient is φ = 406399932.

The previous prime is 406399927. The next prime is 406399991. The reversal of 406399933 is 339993604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393704964 + 12694969 = 19842^2 + 3563^2 .

It is a cyclic number.

It is not a de Polignac number, because 406399933 - 2²¹ = 404302781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406399033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203199966 + 203199967.

It is an arithmetic number, because the mean of its divisors is an integer number (203199967).

Almost surely, 2^406399933 is an apocalyptic number.

It is an amenable number.

406399933 is a deficient number, since it is larger than the sum of its proper divisors (1).

406399933 is an equidigital number, since it uses as much as digits as its factorization.

406399933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 46.

The square root of 406399933 is about 20159.3634076079. The cubic root of 406399933 is about 740.7151189051.

The spelling of 406399933 in words is "four hundred six million, three hundred ninety-nine thousand, nine hundred thirty-three".