78379065 has 12 divisors (see below), whose sum is σ = 135857124. Its totient is φ = 41802144.

The previous prime is 78379051. The next prime is 78379069. The reversal of 78379065 is 56097387.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47941776 + 30437289 = 6924^2 + 5517^2 .

It is not a de Polignac number, because 78379065 - 2¹⁴ = 78362681 is a prime.

It is a super-2 number, since 2×78379065² = 12286555660548450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1741757 = 78379065 / (7 + 8 + 3 + 7 + 9 + 0 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 78379065.

It is not an unprimeable number, because it can be changed into a prime (78379069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 870834 + ... + 870923.

It is an arithmetic number, because the mean of its divisors is an integer number (11321427).

Almost surely, 2^78379065 is an apocalyptic number.

It is an amenable number.

78379065 is a deficient number, since it is larger than the sum of its proper divisors (57478059).

78379065 is a wasteful number, since it uses less digits than its factorization.

78379065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741768 (or 1741765 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 78379065 is about 8853.1951859202. The cubic root of 78379065 is about 427.9568932770.

The spelling of 78379065 in words is "seventy-eight million, three hundred seventy-nine thousand, sixty-five".