428977 has 2 divisors, whose sum is σ = 428978. Its totient is φ = 428976.

The previous prime is 428957. The next prime is 429007. The reversal of 428977 is 779824.

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., 389376 + 39601 = 624^2 + 199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (428957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214488 + 214489.

It is an arithmetic number, because the mean of its divisors is an integer number (214489).

2⁴²⁸⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

428977 is a deficient number, since it is larger than the sum of its proper divisors (1).

428977 is an equidigital number, since it uses as much as digits as its factorization.

428977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 428977 is about 654.9633577537. The cubic root of 428977 is about 75.4185194679.

The spelling of 428977 in words is "four hundred twenty-eight thousand, nine hundred seventy-seven".