78036965 has 4 divisors (see below), whose sum is σ = 93644364. Its totient is φ = 62429568.

The previous prime is 78036961. The next prime is 78036983. The reversal of 78036965 is 56963087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56963087 = 71 ⋅802297.

It can be written as a sum of positive squares in 2 ways, for example, as 32649796 + 45387169 = 5714^2 + 6737^2 .

It is a cyclic number.

It is not a de Polignac number, because 78036965 - 2² = 78036961 is a prime.

It is a super-2 number, since 2×78036965² = 12179535812822450, 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 (78036961) 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 3 ways as a sum of consecutive naturals, for example, 7803692 + ... + 7803701.

It is an arithmetic number, because the mean of its divisors is an integer number (23411091).

Almost surely, 2^78036965 is an apocalyptic number.

It is an amenable number.

78036965 is a deficient number, since it is larger than the sum of its proper divisors (15607399).

78036965 is a wasteful number, since it uses less digits than its factorization.

78036965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15607398.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 78036965 is about 8833.8533494733. The cubic root of 78036965 is about 427.3333527361. Note that the first 4 decimals are identical.

The spelling of 78036965 in words is "seventy-eight million, thirty-six thousand, nine hundred sixty-five".