78597993 has 8 divisors (see below), whose sum is σ = 106774848. Its totient is φ = 51409904.

The previous prime is 78597913. The next prime is 78597997. The reversal of 78597993 is 39979587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78597993 - 2¹⁴ = 78581609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78597997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247005 + ... + 247322.

It is an arithmetic number, because the mean of its divisors is an integer number (13346856).

Almost surely, 2^78597993 is an apocalyptic number.

It is an amenable number.

78597993 is a deficient number, since it is larger than the sum of its proper divisors (28176855).

78597993 is a wasteful number, since it uses less digits than its factorization.

78597993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494383.

The product of its digits is 4286520, while the sum is 57.

The square root of 78597993 is about 8865.5509135079. The cubic root of 78597993 is about 428.3549785257.

The spelling of 78597993 in words is "seventy-eight million, five hundred ninety-seven thousand, nine hundred ninety-three".