84817553 has 2 divisors, whose sum is σ = 84817554. Its totient is φ = 84817552.

The previous prime is 84817541. The next prime is 84817559. The reversal of 84817553 is 35571848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71031184 + 13786369 = 8428^2 + 3713^2 .

It is a cyclic number.

It is not a de Polignac number, because 84817553 - 2¹² = 84813457 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84817553.

It is not a weakly prime, because it can be changed into another prime (84817559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42408776 + 42408777.

It is an arithmetic number, because the mean of its divisors is an integer number (42408777).

Almost surely, 2^84817553 is an apocalyptic number.

It is an amenable number.

84817553 is a deficient number, since it is larger than the sum of its proper divisors (1).

84817553 is an equidigital number, since it uses as much as digits as its factorization.

84817553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 41.

The square root of 84817553 is about 9209.6445642598. The cubic root of 84817553 is about 439.3681581895.

The spelling of 84817553 in words is "eighty-four million, eight hundred seventeen thousand, five hundred fifty-three".