428972867 has 2 divisors, whose sum is σ = 428972868. Its totient is φ = 428972866.

The previous prime is 428972837. The next prime is 428972903. The reversal of 428972867 is 768279824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428972867 - 2²⁸ = 160537411 is a prime.

It is not a weakly prime, because it can be changed into another prime (428972837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214486433 + 214486434.

It is an arithmetic number, because the mean of its divisors is an integer number (214486434).

Almost surely, 2^428972867 is an apocalyptic number.

428972867 is a deficient number, since it is larger than the sum of its proper divisors (1).

428972867 is an equidigital number, since it uses as much as digits as its factorization.

428972867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 53.

The square root of 428972867 is about 20711.6601700588. The cubic root of 428972867 is about 754.1827725927.

The spelling of 428972867 in words is "four hundred twenty-eight million, nine hundred seventy-two thousand, eight hundred sixty-seven".