84256969 has 2 divisors, whose sum is σ = 84256970. Its totient is φ = 84256968.

The previous prime is 84256937. The next prime is 84256993. The reversal of 84256969 is 96965248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60637369 + 23619600 = 7787^2 + 4860^2 .

It is a cyclic number.

It is not a de Polignac number, because 84256969 - 2⁵ = 84256937 is a prime.

It is a super-2 number, since 2×84256969² = 14198473650133922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84256999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42128484 + 42128485.

It is an arithmetic number, because the mean of its divisors is an integer number (42128485).

Almost surely, 2^84256969 is an apocalyptic number.

It is an amenable number.

84256969 is a deficient number, since it is larger than the sum of its proper divisors (1).

84256969 is an equidigital number, since it uses as much as digits as its factorization.

84256969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 84256969 is about 9179.1594931126. The cubic root of 84256969 is about 438.3980469287.

The spelling of 84256969 in words is "eighty-four million, two hundred fifty-six thousand, nine hundred sixty-nine".