13956942091 has 4 divisors (see below), whose sum is σ = 13962055384. Its totient is φ = 13951828800.

The previous prime is 13956942089. The next prime is 13956942121. The reversal of 13956942091 is 19024965931.

13956942091 = T₉₆₄₅₉ + T₉₆₄₆₀ + T₉₆₄₆₁.

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

It is a 6-Lehmer number, since φ(13956942091) divides (13956942091-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 13956942091 - 2¹ = 13956942089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13956942031) 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, 2552550 + ... + 2558011.

It is an arithmetic number, because the mean of its divisors is an integer number (3490513846).

Almost surely, 2^13956942091 is an apocalyptic number.

13956942091 is the 96461-st centered triangular number.

13956942091 is a deficient number, since it is larger than the sum of its proper divisors (5113293).

13956942091 is an equidigital number, since it uses as much as digits as its factorization.

13956942091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113292.

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 13956942091 in words is "thirteen billion, nine hundred fifty-six million, nine hundred forty-two thousand, ninety-one".