78756997 has 8 divisors (see below), whose sum is σ = 86074560. Its totient is φ = 71465760.

The previous prime is 78756989. The next prime is 78757051. The reversal of 78756997 is 79965787.

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 78756997 - 2³ = 78756989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78756907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33 + ... + 12550.

It is an arithmetic number, because the mean of its divisors is an integer number (10759320).

Almost surely, 2^78756997 is an apocalyptic number.

It is an amenable number.

78756997 is a deficient number, since it is larger than the sum of its proper divisors (7317563).

78756997 is a wasteful number, since it uses less digits than its factorization.

78756997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13163.

The product of its digits is 6667920, while the sum is 58.

The square root of 78756997 is about 8874.5139021808. The cubic root of 78756997 is about 428.6436384729.

The spelling of 78756997 in words is "seventy-eight million, seven hundred fifty-six thousand, nine hundred ninety-seven".