84729647 has 2 divisors, whose sum is σ = 84729648. Its totient is φ = 84729646.

The previous prime is 84729641. The next prime is 84729653. The reversal of 84729647 is 74692748.

It is a balanced prime because it is at equal distance from previous prime (84729641) and next prime (84729653).

It is a cyclic number.

It is not a de Polignac number, because 84729647 - 2²⁰ = 83681071 is a prime.

It is a super-2 number, since 2×84729647² = 14358226161489218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84729641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42364823 + 42364824.

It is an arithmetic number, because the mean of its divisors is an integer number (42364824).

Almost surely, 2^84729647 is an apocalyptic number.

84729647 is a deficient number, since it is larger than the sum of its proper divisors (1).

84729647 is an equidigital number, since it uses as much as digits as its factorization.

84729647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 84729647 is about 9204.8708301638. The cubic root of 84729647 is about 439.2163167888.

The spelling of 84729647 in words is "eighty-four million, seven hundred twenty-nine thousand, six hundred forty-seven".