78497099 has 4 divisors (see below), whose sum is σ = 79274400. Its totient is φ = 77719800.

The previous prime is 78497093. The next prime is 78497117. The reversal of 78497099 is 99079487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78497099 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 78497099.

It is not an unprimeable number, because it can be changed into a prime (78497093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388499 + ... + 388700.

It is an arithmetic number, because the mean of its divisors is an integer number (19818600).

Almost surely, 2^78497099 is an apocalyptic number.

78497099 is a deficient number, since it is larger than the sum of its proper divisors (777301).

78497099 is a wasteful number, since it uses less digits than its factorization.

78497099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777300.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 78497099 is about 8859.8588589209. The cubic root of 78497099 is about 428.1716110226.

The spelling of 78497099 in words is "seventy-eight million, four hundred ninety-seven thousand, ninety-nine".