78068961 has 32 divisors (see below), whose sum is σ = 119750400. Its totient is φ = 50232960.

The previous prime is 78068917. The next prime is 78068983. The reversal of 78068961 is 16986087.

It is a happy number.

It is not a de Polignac number, because 78068961 - 2⁶ = 78068897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78068761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120340 + ... + 120986.

It is an arithmetic number, because the mean of its divisors is an integer number (3742200).

Almost surely, 2^78068961 is an apocalyptic number.

It is an amenable number.

78068961 is a deficient number, since it is larger than the sum of its proper divisors (41681439).

78068961 is a wasteful number, since it uses less digits than its factorization.

78068961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 78068961 is about 8835.6641516074. The cubic root of 78068961 is about 427.3917485219.

The spelling of 78068961 in words is "seventy-eight million, sixty-eight thousand, nine hundred sixty-one".