84398913 has 12 divisors (see below), whose sum is σ = 122004480. Its totient is φ = 56222136.

The previous prime is 84398879. The next prime is 84398917. The reversal of 84398913 is 31989348.

It is not a de Polignac number, because 84398913 - 2²² = 80204609 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (84398917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12148 + ... + 17786.

It is an arithmetic number, because the mean of its divisors is an integer number (10167040).

Almost surely, 2^84398913 is an apocalyptic number.

It is an amenable number.

84398913 is a deficient number, since it is larger than the sum of its proper divisors (37605567).

84398913 is a wasteful number, since it uses less digits than its factorization.

84398913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7308 (or 7305 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 84398913 is about 9186.8881020724. Note that the first 3 decimals coincide. The cubic root of 84398913 is about 438.6440920988.

The spelling of 84398913 in words is "eighty-four million, three hundred ninety-eight thousand, nine hundred thirteen".