78955199 has 4 divisors (see below), whose sum is σ = 78989040. Its totient is φ = 78921360.

The previous prime is 78955183. The next prime is 78955231. The reversal of 78955199 is 99155987.

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

It is a cyclic number.

It is not a de Polignac number, because 78955199 - 2⁴ = 78955183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78955199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78955169) 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, 13139 + ... + 18180.

It is an arithmetic number, because the mean of its divisors is an integer number (19747260).

Almost surely, 2^78955199 is an apocalyptic number.

78955199 is a deficient number, since it is larger than the sum of its proper divisors (33841).

78955199 is a wasteful number, since it uses less digits than its factorization.

78955199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33840.

The product of its digits is 1020600, while the sum is 53.

The square root of 78955199 is about 8885.6738067521. The cubic root of 78955199 is about 429.0029159971.

The spelling of 78955199 in words is "seventy-eight million, nine hundred fifty-five thousand, one hundred ninety-nine".