84217369 has 2 divisors, whose sum is σ = 84217370. Its totient is φ = 84217368.

The previous prime is 84217351. The next prime is 84217417. The reversal of 84217369 is 96371248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82591744 + 1625625 = 9088^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 84217369 - 2⁷ = 84217241 is a prime.

It is a super-2 number, since 2×84217369² = 14185130482564322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84217169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42108684 + 42108685.

It is an arithmetic number, because the mean of its divisors is an integer number (42108685).

Almost surely, 2^84217369 is an apocalyptic number.

It is an amenable number.

84217369 is a deficient number, since it is larger than the sum of its proper divisors (1).

84217369 is an equidigital number, since it uses as much as digits as its factorization.

84217369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 84217369 is about 9177.0021793612. The cubic root of 84217369 is about 438.3293551503.

Subtracting from 84217369 its sum of digits (40), we obtain a square (84217329 = 9177²).

The spelling of 84217369 in words is "eighty-four million, two hundred seventeen thousand, three hundred sixty-nine".