139866194947 has 16 divisors (see below), whose sum is σ = 144840370752. Its totient is φ = 134956869120.

The previous prime is 139866194917. The next prime is 139866194959. The reversal of 139866194947 is 749491668931.

It is a cyclic number.

It is not a de Polignac number, because 139866194947 - 2¹⁵ = 139866162179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139866194917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5222922 + ... + 5249632.

It is an arithmetic number, because the mean of its divisors is an integer number (9052523172).

Almost surely, 2^139866194947 is an apocalyptic number.

139866194947 is a deficient number, since it is larger than the sum of its proper divisors (4974175805).

139866194947 is a wasteful number, since it uses less digits than its factorization.

139866194947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27918.

The product of its digits is 70543872, while the sum is 67.

The spelling of 139866194947 in words is "one hundred thirty-nine billion, eight hundred sixty-six million, one hundred ninety-four thousand, nine hundred forty-seven".