406489777 has 2 divisors, whose sum is σ = 406489778. Its totient is φ = 406489776.

The previous prime is 406489739. The next prime is 406489801. The reversal of 406489777 is 777984604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238424481 + 168065296 = 15441^2 + 12964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406489777 is a prime.

It is not a weakly prime, because it can be changed into another prime (406489717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203244888 + 203244889.

It is an arithmetic number, because the mean of its divisors is an integer number (203244889).

Almost surely, 2^406489777 is an apocalyptic number.

It is an amenable number.

406489777 is a deficient number, since it is larger than the sum of its proper divisors (1).

406489777 is an equidigital number, since it uses as much as digits as its factorization.

406489777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The square root of 406489777 is about 20161.5916286388. The cubic root of 406489777 is about 740.7696988892.

The spelling of 406489777 in words is "four hundred six million, four hundred eighty-nine thousand, seven hundred seventy-seven".