84797947 has 12 divisors (see below), whose sum is σ = 93205560. Its totient is φ = 77096448.

The previous prime is 84797939. The next prime is 84797953. The reversal of 84797947 is 74979748.

It is not a de Polignac number, because 84797947 - 2³ = 84797939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84797047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7579 + ... + 15067.

It is an arithmetic number, because the mean of its divisors is an integer number (7767130).

Almost surely, 2^84797947 is an apocalyptic number.

84797947 is a deficient number, since it is larger than the sum of its proper divisors (8407613).

84797947 is a wasteful number, since it uses less digits than its factorization.

84797947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7582 (or 7569 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 55.

The square root of 84797947 is about 9208.5800751256. The cubic root of 84797947 is about 439.3343015343.

The spelling of 84797947 in words is "eighty-four million, seven hundred ninety-seven thousand, nine hundred forty-seven".