402223777 has 2 divisors, whose sum is σ = 402223778. Its totient is φ = 402223776.

The previous prime is 402223769. The next prime is 402223889. The reversal of 402223777 is 777322204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232989696 + 169234081 = 15264^2 + 13009^2 .

It is a cyclic number.

It is not a de Polignac number, because 402223777 - 2³ = 402223769 is a prime.

It is not a weakly prime, because it can be changed into another prime (402223477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201111888 + 201111889.

It is an arithmetic number, because the mean of its divisors is an integer number (201111889).

Almost surely, 2^402223777 is an apocalyptic number.

It is an amenable number.

402223777 is a deficient number, since it is larger than the sum of its proper divisors (1).

402223777 is an equidigital number, since it uses as much as digits as its factorization.

402223777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 402223777 is about 20055.5173705392. The cubic root of 402223777 is about 738.1691879591.

The spelling of 402223777 in words is "four hundred two million, two hundred twenty-three thousand, seven hundred seventy-seven".