84615993 has 36 divisors (see below), whose sum is σ = 155112048. Its totient is φ = 43953840.

The previous prime is 84615989. The next prime is 84616001. The reversal of 84615993 is 39951648.

It is a happy number.

It is not a de Polignac number, because 84615993 - 2² = 84615989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84615943) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3871 + ... + 13572.

It is an arithmetic number, because the mean of its divisors is an integer number (4308668).

Almost surely, 2^84615993 is an apocalyptic number.

It is an amenable number.

84615993 is a deficient number, since it is larger than the sum of its proper divisors (70496055).

84615993 is a wasteful number, since it uses less digits than its factorization.

84615993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17474 (or 17464 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 84615993 is about 9198.6951792088. The cubic root of 84615993 is about 439.0198447174.

The spelling of 84615993 in words is "eighty-four million, six hundred fifteen thousand, nine hundred ninety-three".