3978078699 has 8 divisors (see below), whose sum is σ = 6061834240. Its totient is φ = 2273187816.

The previous prime is 3978078649. The next prime is 3978078707. The reversal of 3978078699 is 9968708793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3978078699 - 2¹⁵ = 3978045931 is a prime.

It is a super-2 number, since 2×3978078699² = 31650220270875065202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3978078619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94716139 + ... + 94716180.

It is an arithmetic number, because the mean of its divisors is an integer number (757729280).

Almost surely, 2^3978078699 is an apocalyptic number.

3978078699 is a deficient number, since it is larger than the sum of its proper divisors (2083755541).

3978078699 is a wasteful number, since it uses less digits than its factorization.

3978078699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189432329.

The product of its (nonzero) digits is 41150592, while the sum is 66.

The square root of 3978078699 is about 63072.0120100826. The cubic root of 3978078699 is about 1584.4959137642.

The spelling of 3978078699 in words is "three billion, nine hundred seventy-eight million, seventy-eight thousand, six hundred ninety-nine".