78698697 has 16 divisors (see below), whose sum is σ = 130824192. Its totient is φ = 40882320.

The previous prime is 78698689. The next prime is 78698731. The reversal of 78698697 is 79689687.

It is not a de Polignac number, because 78698697 - 2³ = 78698689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78698697.

It is not an unprimeable number, because it can be changed into a prime (78698647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170113 + ... + 170574.

It is an arithmetic number, because the mean of its divisors is an integer number (8176512).

Almost surely, 2^78698697 is an apocalyptic number.

78698697 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

78698697 is a deficient number, since it is larger than the sum of its proper divisors (52125495).

78698697 is a wasteful number, since it uses less digits than its factorization.

78698697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340708.

The product of its digits is 9144576, while the sum is 60.

The square root of 78698697 is about 8871.2286071322. The cubic root of 78698697 is about 428.5378443048.

The spelling of 78698697 in words is "seventy-eight million, six hundred ninety-eight thousand, six hundred ninety-seven".