13947526993 has 8 divisors (see below), whose sum is σ = 14328649512. Its totient is φ = 13566623616.

The previous prime is 13947526987. The next prime is 13947527029. The reversal of 13947526993 is 39962574931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2198484544 + 11749042449 = 46888^2 + 108393^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13947526993 - 2¹⁷ = 13947395921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13947526093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78621 + ... + 184597.

It is an arithmetic number, because the mean of its divisors is an integer number (1791081189).

Almost surely, 2^13947526993 is an apocalyptic number.

It is an amenable number.

13947526993 is a deficient number, since it is larger than the sum of its proper divisors (381122519).

13947526993 is a wasteful number, since it uses less digits than its factorization.

13947526993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109571.

The product of its digits is 11022480, while the sum is 58.

The spelling of 13947526993 in words is "thirteen billion, nine hundred forty-seven million, five hundred twenty-six thousand, nine hundred ninety-three".