78495999 has 8 divisors (see below), whose sum is σ = 108037632. Its totient is φ = 50642520.

The previous prime is 78495997. The next prime is 78496013. The reversal of 78495999 is 99959487.

It is a happy number.

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

It is not a de Polignac number, because 78495999 - 2¹ = 78495997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78495997) 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, 421929 + ... + 422114.

It is an arithmetic number, because the mean of its divisors is an integer number (13504704).

Almost surely, 2^78495999 is an apocalyptic number.

78495999 is a deficient number, since it is larger than the sum of its proper divisors (29541633).

78495999 is a wasteful number, since it uses less digits than its factorization.

78495999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844077.

The product of its digits is 7348320, while the sum is 60.

The square root of 78495999 is about 8859.7967809651. The cubic root of 78495999 is about 428.1696109870.

The spelling of 78495999 in words is "seventy-eight million, four hundred ninety-five thousand, nine hundred ninety-nine".