11945999039 has 4 divisors (see below), whose sum is σ = 12864922056. Its totient is φ = 11027076024.

The previous prime is 11945999027. The next prime is 11945999063. The reversal of 11945999039 is 93099954911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93099954911 = 1361 ⋅68405551.

It is a cyclic number.

It is not a de Polignac number, because 11945999039 - 2⁸ = 11945998783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11945999089) 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, 459461489 + ... + 459461514.

It is an arithmetic number, because the mean of its divisors is an integer number (3216230514).

Almost surely, 2^11945999039 is an apocalyptic number.

11945999039 is a deficient number, since it is larger than the sum of its proper divisors (918923017).

11945999039 is an equidigital number, since it uses as much as digits as its factorization.

11945999039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918923016.

The product of its (nonzero) digits is 3542940, while the sum is 59.

The spelling of 11945999039 in words is "eleven billion, nine hundred forty-five million, nine hundred ninety-nine thousand, thirty-nine".