78695387 has 4 divisors (see below), whose sum is σ = 79773480. Its totient is φ = 77617296.

The previous prime is 78695333. The next prime is 78695401. The reversal of 78695387 is 78359687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78359687 = 7 ⋅11194241.

It is a cyclic number.

It is not a de Polignac number, because 78695387 - 2²² = 74501083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78695317) 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, 538937 + ... + 539082.

It is an arithmetic number, because the mean of its divisors is an integer number (19943370).

Almost surely, 2^78695387 is an apocalyptic number.

78695387 is a deficient number, since it is larger than the sum of its proper divisors (1078093).

78695387 is a wasteful number, since it uses less digits than its factorization.

78695387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078092.

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

The square root of 78695387 is about 8871.0420470202. The cubic root of 78695387 is about 428.5318362420.

The spelling of 78695387 in words is "seventy-eight million, six hundred ninety-five thousand, three hundred eighty-seven".