428957393 has 2 divisors, whose sum is σ = 428957394. Its totient is φ = 428957392.

The previous prime is 428957381. The next prime is 428957411. The reversal of 428957393 is 393759824.

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., 407353489 + 21603904 = 20183^2 + 4648^2 .

It is a cyclic number.

It is not a de Polignac number, because 428957393 - 2²² = 424763089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (428957093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214478696 + 214478697.

It is an arithmetic number, because the mean of its divisors is an integer number (214478697).

Almost surely, 2^428957393 is an apocalyptic number.

It is an amenable number.

428957393 is a deficient number, since it is larger than the sum of its proper divisors (1).

428957393 is an equidigital number, since it uses as much as digits as its factorization.

428957393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 50.

The square root of 428957393 is about 20711.2866089966. The cubic root of 428957393 is about 754.1737041368.

The spelling of 428957393 in words is "four hundred twenty-eight million, nine hundred fifty-seven thousand, three hundred ninety-three".