428333957 has 2 divisors, whose sum is σ = 428333958. Its totient is φ = 428333956.

The previous prime is 428333911. The next prime is 428333959. The reversal of 428333957 is 759333824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427414276 + 919681 = 20674^2 + 959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428333957 is a prime.

Together with 428333959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428333959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214166978 + 214166979.

It is an arithmetic number, because the mean of its divisors is an integer number (214166979).

Almost surely, 2^428333957 is an apocalyptic number.

It is an amenable number.

428333957 is a deficient number, since it is larger than the sum of its proper divisors (1).

428333957 is an equidigital number, since it uses as much as digits as its factorization.

428333957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 44.

The square root of 428333957 is about 20696.2305021953. The cubic root of 428333957 is about 753.8081612248.

The spelling of 428333957 in words is "four hundred twenty-eight million, three hundred thirty-three thousand, nine hundred fifty-seven".