84520769 has 2 divisors, whose sum is σ = 84520770. Its totient is φ = 84520768.

The previous prime is 84520763. The next prime is 84520783. The reversal of 84520769 is 96702548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50239744 + 34281025 = 7088^2 + 5855^2 .

It is a cyclic number.

It is not a de Polignac number, because 84520769 - 2²⁴ = 67743553 is a prime.

It is a super-2 number, since 2×84520769² = 14287520784702722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84520763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42260384 + 42260385.

It is an arithmetic number, because the mean of its divisors is an integer number (42260385).

Almost surely, 2^84520769 is an apocalyptic number.

It is an amenable number.

84520769 is a deficient number, since it is larger than the sum of its proper divisors (1).

84520769 is an equidigital number, since it uses as much as digits as its factorization.

84520769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 84520769 is about 9193.5177706904. The cubic root of 84520769 is about 438.8550968327.

The spelling of 84520769 in words is "eighty-four million, five hundred twenty thousand, seven hundred sixty-nine".