78686001 has 12 divisors (see below), whose sum is σ = 116301328. Its totient is φ = 51237144.

The previous prime is 78685991. The next prime is 78686021. The reversal of 78686001 is 10068687.

It is not a de Polignac number, because 78686001 - 2⁹ = 78685489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78686021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101275 + ... + 102048.

Almost surely, 2^78686001 is an apocalyptic number.

It is an amenable number.

78686001 is a deficient number, since it is larger than the sum of its proper divisors (37615327).

78686001 is a wasteful number, since it uses less digits than its factorization.

78686001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203372 (or 203369 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 78686001 is about 8870.5130065854. The cubic root of 78686001 is about 428.5147985650.

The spelling of 78686001 in words is "seventy-eight million, six hundred eighty-six thousand, one".