428379251 has 2 divisors, whose sum is σ = 428379252. Its totient is φ = 428379250.

The previous prime is 428379241. The next prime is 428379269. The reversal of 428379251 is 152973824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428379251 - 2²⁶ = 361270387 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 428379199 and 428379208.

It is not a weakly prime, because it can be changed into another prime (428379241) 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, 214189625 + 214189626.

It is an arithmetic number, because the mean of its divisors is an integer number (214189626).

Almost surely, 2^428379251 is an apocalyptic number.

428379251 is a deficient number, since it is larger than the sum of its proper divisors (1).

428379251 is an equidigital number, since it uses as much as digits as its factorization.

428379251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 428379251 is about 20697.3247305056. The cubic root of 428379251 is about 753.8347306674.

The spelling of 428379251 in words is "four hundred twenty-eight million, three hundred seventy-nine thousand, two hundred fifty-one".