84385481 has 2 divisors, whose sum is σ = 84385482. Its totient is φ = 84385480.

The previous prime is 84385453. The next prime is 84385489. The reversal of 84385481 is 18458348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51609856 + 32775625 = 7184^2 + 5725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84385481 is a prime.

It is a super-2 number, since 2×84385481² = 14241818807202722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84385489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42192740 + 42192741.

It is an arithmetic number, because the mean of its divisors is an integer number (42192741).

Almost surely, 2^84385481 is an apocalyptic number.

It is an amenable number.

84385481 is a deficient number, since it is larger than the sum of its proper divisors (1).

84385481 is an equidigital number, since it uses as much as digits as its factorization.

84385481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 41.

The square root of 84385481 is about 9186.1570310985. The cubic root of 84385481 is about 438.6208209459.

The spelling of 84385481 in words is "eighty-four million, three hundred eighty-five thousand, four hundred eighty-one".