2986378139 has 4 divisors (see below), whose sum is σ = 2986904424. Its totient is φ = 2985851856.

The previous prime is 2986378133. The next prime is 2986378193. The reversal of 2986378139 is 9318736892.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2986378139 - 2⁴ = 2986378123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2986378133) 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, 254537 + ... + 266010.

It is an arithmetic number, because the mean of its divisors is an integer number (746726106).

Almost surely, 2^2986378139 is an apocalyptic number.

2986378139 is a deficient number, since it is larger than the sum of its proper divisors (526285).

2986378139 is an equidigital number, since it uses as much as digits as its factorization.

2986378139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526284.

The product of its digits is 3919104, while the sum is 56.

The square root of 2986378139 is about 54647.7642635085. The cubic root of 2986378139 is about 1440.0633554623.

The spelling of 2986378139 in words is "two billion, nine hundred eighty-six million, three hundred seventy-eight thousand, one hundred thirty-nine".