428870137 has 2 divisors, whose sum is σ = 428870138. Its totient is φ = 428870136.

The previous prime is 428870119. The next prime is 428870153. The reversal of 428870137 is 731078824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310147321 + 118722816 = 17611^2 + 10896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428870137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428870137.

It is not a weakly prime, because it can be changed into another prime (428870837) 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, 214435068 + 214435069.

It is an arithmetic number, because the mean of its divisors is an integer number (214435069).

Almost surely, 2^428870137 is an apocalyptic number.

It is an amenable number.

428870137 is a deficient number, since it is larger than the sum of its proper divisors (1).

428870137 is an equidigital number, since it uses as much as digits as its factorization.

428870137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 428870137 is about 20709.1800175671. The cubic root of 428870137 is about 754.1225641368.

The spelling of 428870137 in words is "four hundred twenty-eight million, eight hundred seventy thousand, one hundred thirty-seven".