78513369 has 16 divisors (see below), whose sum is σ = 114462720. Its totient is φ = 47474960.

The previous prime is 78513349. The next prime is 78513373. The reversal of 78513369 is 96331587.

It is a cyclic number.

It is not a de Polignac number, because 78513369 - 2⁷ = 78513241 is a prime.

It is a super-2 number, since 2×78513369² = 12328698223460322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78513369.

It is not an unprimeable number, because it can be changed into a prime (78513349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13324 + ... + 18290.

It is an arithmetic number, because the mean of its divisors is an integer number (7153920).

Almost surely, 2^78513369 is an apocalyptic number.

It is an amenable number.

78513369 is a deficient number, since it is larger than the sum of its proper divisors (35949351).

78513369 is a wasteful number, since it uses less digits than its factorization.

78513369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460.

The product of its digits is 136080, while the sum is 42.

The square root of 78513369 is about 8860.7769975324. The cubic root of 78513369 is about 428.2011911853.

The spelling of 78513369 in words is "seventy-eight million, five hundred thirteen thousand, three hundred sixty-nine".