84400247 has 2 divisors, whose sum is σ = 84400248. Its totient is φ = 84400246.

The previous prime is 84400243. The next prime is 84400319. The reversal of 84400247 is 74200448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84400247 - 2² = 84400243 is a prime.

It is a super-2 number, since 2×84400247² = 14246803387322018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84400243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42200123 + 42200124.

It is an arithmetic number, because the mean of its divisors is an integer number (42200124).

Almost surely, 2^84400247 is an apocalyptic number.

84400247 is a deficient number, since it is larger than the sum of its proper divisors (1).

84400247 is an equidigital number, since it uses as much as digits as its factorization.

84400247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 84400247 is about 9186.9607052605. The cubic root of 84400247 is about 438.6464031402.

The spelling of 84400247 in words is "eighty-four million, four hundred thousand, two hundred forty-seven".