84004457 has 2 divisors, whose sum is σ = 84004458. Its totient is φ = 84004456.

The previous prime is 84004423. The next prime is 84004483. The reversal of 84004457 is 75440048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52070656 + 31933801 = 7216^2 + 5651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84004457 is a prime.

It is not a weakly prime, because it can be changed into another prime (84001457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42002228 + 42002229.

It is an arithmetic number, because the mean of its divisors is an integer number (42002229).

Almost surely, 2^84004457 is an apocalyptic number.

It is an amenable number.

84004457 is a deficient number, since it is larger than the sum of its proper divisors (1).

84004457 is an equidigital number, since it uses as much as digits as its factorization.

84004457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 84004457 is about 9165.3945359706. The cubic root of 84004457 is about 437.9596596918.

The spelling of 84004457 in words is "eighty-four million, four thousand, four hundred fifty-seven".