78997763 has 8 divisors (see below), whose sum is σ = 89552400. Its totient is φ = 69082848.

The previous prime is 78997747. The next prime is 78997771. The reversal of 78997763 is 36779987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78997763 - 2⁴ = 78997747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78997699 and 78997708.

It is not an unprimeable number, because it can be changed into a prime (78997733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159668 + ... + 160161.

It is an arithmetic number, because the mean of its divisors is an integer number (11194050).

Almost surely, 2^78997763 is an apocalyptic number.

78997763 is a deficient number, since it is larger than the sum of its proper divisors (10554637).

78997763 is a wasteful number, since it uses less digits than its factorization.

78997763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319861.

The product of its digits is 4000752, while the sum is 56.

The square root of 78997763 is about 8888.0685753430. The cubic root of 78997763 is about 429.0799926180.

The spelling of 78997763 in words is "seventy-eight million, nine hundred ninety-seven thousand, seven hundred sixty-three".