427997 has 2 divisors, whose sum is σ = 427998. Its totient is φ = 427996.

The previous prime is 427993. The next prime is 428003. The reversal of 427997 is 799724.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276676 + 151321 = 526^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 427997 - 2² = 427993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 427997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213998 + 213999.

It is an arithmetic number, because the mean of its divisors is an integer number (213999).

2⁴²⁷⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

427997 is a deficient number, since it is larger than the sum of its proper divisors (1).

427997 is an equidigital number, since it uses as much as digits as its factorization.

427997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 427997 is about 654.2147965309. The cubic root of 427997 is about 75.3610443559.

The spelling of 427997 in words is "four hundred twenty-seven thousand, nine hundred ninety-seven".