78310681 has 8 divisors (see below), whose sum is σ = 81043200. Its totient is φ = 75591120.

The previous prime is 78310669. The next prime is 78310691. The reversal of 78310681 is 18601387.

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 78310681 - 2⁵ = 78310649 is a prime.

It is a super-2 number, since 2×78310681² = 12265125517367522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78310691) 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, 9975 + ... + 16003.

It is an arithmetic number, because the mean of its divisors is an integer number (10130400).

Almost surely, 2^78310681 is an apocalyptic number.

It is an amenable number.

78310681 is a deficient number, since it is larger than the sum of its proper divisors (2732519).

78310681 is a wasteful number, since it uses less digits than its factorization.

78310681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6479.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 78310681 is about 8849.3322346943. The cubic root of 78310681 is about 427.8323960895.

The spelling of 78310681 in words is "seventy-eight million, three hundred ten thousand, six hundred eighty-one".