8434991 has 2 divisors, whose sum is σ = 8434992. Its totient is φ = 8434990.

The previous prime is 8434967. The next prime is 8434999. The reversal of 8434991 is 1994348.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8434991 - 2¹⁸ = 8172847 is a prime.

It is a super-2 number, since 2×8434991² = 142298146340162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8434999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4217495 + 4217496.

It is an arithmetic number, because the mean of its divisors is an integer number (4217496).

Almost surely, 2^8434991 is an apocalyptic number.

8434991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8434991 is an equidigital number, since it uses as much as digits as its factorization.

8434991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 8434991 is about 2904.3055968682. The cubic root of 8434991 is about 203.5611400625.

The spelling of 8434991 in words is "eight million, four hundred thirty-four thousand, nine hundred ninety-one".