84234991 has 2 divisors, whose sum is σ = 84234992. Its totient is φ = 84234990.

The previous prime is 84234959. The next prime is 84235003. The reversal of 84234991 is 19943248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84234991 - 2⁵ = 84234959 is a prime.

It is a super-3 number, since 3×84234991³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84232991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42117495 + 42117496.

It is an arithmetic number, because the mean of its divisors is an integer number (42117496).

Almost surely, 2^84234991 is an apocalyptic number.

84234991 is a deficient number, since it is larger than the sum of its proper divisors (1).

84234991 is an equidigital number, since it uses as much as digits as its factorization.

84234991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 84234991 is about 9177.9622465992. The cubic root of 84234991 is about 438.3599256502.

The spelling of 84234991 in words is "eighty-four million, two hundred thirty-four thousand, nine hundred ninety-one".