84098591 has 2 divisors, whose sum is σ = 84098592. Its totient is φ = 84098590.

The previous prime is 84098563. The next prime is 84098627. The reversal of 84098591 is 19589048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84098591 - 2⁶ = 84098527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84098501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42049295 + 42049296.

It is an arithmetic number, because the mean of its divisors is an integer number (42049296).

Almost surely, 2^84098591 is an apocalyptic number.

84098591 is a deficient number, since it is larger than the sum of its proper divisors (1).

84098591 is an equidigital number, since it uses as much as digits as its factorization.

84098591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 84098591 is about 9170.5283926282. The cubic root of 84098591 is about 438.1231887325.

The spelling of 84098591 in words is "eighty-four million, ninety-eight thousand, five hundred ninety-one".