428990293 has 2 divisors, whose sum is σ = 428990294. Its totient is φ = 428990292.

The previous prime is 428990249. The next prime is 428990297. The reversal of 428990293 is 392099824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 391327524 + 37662769 = 19782^2 + 6137^2 .

It is a cyclic number.

It is not a de Polignac number, because 428990293 - 2²¹ = 426893141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428990297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214495146 + 214495147.

It is an arithmetic number, because the mean of its divisors is an integer number (214495147).

Almost surely, 2^428990293 is an apocalyptic number.

It is an amenable number.

428990293 is a deficient number, since it is larger than the sum of its proper divisors (1).

428990293 is an equidigital number, since it uses as much as digits as its factorization.

428990293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 428990293 is about 20712.0808466943. The cubic root of 428990293 is about 754.1929847468.

The spelling of 428990293 in words is "four hundred twenty-eight million, nine hundred ninety thousand, two hundred ninety-three".