78773965 has 16 divisors (see below), whose sum is σ = 99289728. Its totient is φ = 59881536.

The previous prime is 78773963. The next prime is 78773969. The reversal of 78773965 is 56937787.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78773965 - 2¹ = 78773963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78773963) 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 15 ways as a sum of consecutive naturals, for example, 15874 + ... + 20236.

It is an arithmetic number, because the mean of its divisors is an integer number (6205608).

Almost surely, 2^78773965 is an apocalyptic number.

It is an amenable number.

78773965 is a deficient number, since it is larger than the sum of its proper divisors (20515763).

78773965 is a wasteful number, since it uses less digits than its factorization.

78773965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4548.

The product of its digits is 2222640, while the sum is 52.

The square root of 78773965 is about 8875.4698467180. The cubic root of 78773965 is about 428.6744196660.

The spelling of 78773965 in words is "seventy-eight million, seven hundred seventy-three thousand, nine hundred sixty-five".