78897599 has 8 divisors (see below), whose sum is σ = 86448720. Its totient is φ = 71409600.

The previous prime is 78897593. The next prime is 78897601. The reversal of 78897599 is 99579887.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78897599 is a prime.

It is a super-2 number, since 2×78897599² = 12449662255929602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78897593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13142 + ... + 18179.

It is an arithmetic number, because the mean of its divisors is an integer number (10806090).

Almost surely, 2^78897599 is an apocalyptic number.

78897599 is a deficient number, since it is larger than the sum of its proper divisors (7551121).

78897599 is a wasteful number, since it uses less digits than its factorization.

78897599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31561.

The product of its digits is 11430720, while the sum is 62.

The square root of 78897599 is about 8882.4320430837. The cubic root of 78897599 is about 428.8985674563.

The spelling of 78897599 in words is "seventy-eight million, eight hundred ninety-seven thousand, five hundred ninety-nine".