78785963 has 4 divisors (see below), whose sum is σ = 79508880. Its totient is φ = 78063048.

The previous prime is 78785947. The next prime is 78785981. The reversal of 78785963 is 36958787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36958787 = 3457 ⋅10691.

It is a cyclic number.

It is not a de Polignac number, because 78785963 - 2⁴ = 78785947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78785983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361295 + ... + 361512.

It is an arithmetic number, because the mean of its divisors is an integer number (19877220).

Almost surely, 2^78785963 is an apocalyptic number.

78785963 is a deficient number, since it is larger than the sum of its proper divisors (722917).

78785963 is a wasteful number, since it uses less digits than its factorization.

78785963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722916.

The product of its digits is 2540160, while the sum is 53.

The square root of 78785963 is about 8876.1457288623. The cubic root of 78785963 is about 428.6961822478.

The spelling of 78785963 in words is "seventy-eight million, seven hundred eighty-five thousand, nine hundred sixty-three".