428973287 has 2 divisors, whose sum is σ = 428973288. Its totient is φ = 428973286.

The previous prime is 428973229. The next prime is 428973313. The reversal of 428973287 is 782379824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428973287 - 2²⁶ = 361864423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428973487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214486643 + 214486644.

It is an arithmetic number, because the mean of its divisors is an integer number (214486644).

Almost surely, 2^428973287 is an apocalyptic number.

428973287 is a deficient number, since it is larger than the sum of its proper divisors (1).

428973287 is an equidigital number, since it uses as much as digits as its factorization.

428973287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The square root of 428973287 is about 20711.6703092725. The cubic root of 428973287 is about 754.1830187284.

The spelling of 428973287 in words is "four hundred twenty-eight million, nine hundred seventy-three thousand, two hundred eighty-seven".