84426247 has 2 divisors, whose sum is σ = 84426248. Its totient is φ = 84426246.

The previous prime is 84426197. The next prime is 84426269. The reversal of 84426247 is 74262448.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84426247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84426647) 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, 42213123 + 42213124.

It is an arithmetic number, because the mean of its divisors is an integer number (42213124).

Almost surely, 2^84426247 is an apocalyptic number.

84426247 is a deficient number, since it is larger than the sum of its proper divisors (1).

84426247 is an equidigital number, since it uses as much as digits as its factorization.

84426247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 37.

The square root of 84426247 is about 9188.3756453467. The cubic root of 84426247 is about 438.6914410636.

The spelling of 84426247 in words is "eighty-four million, four hundred twenty-six thousand, two hundred forty-seven".