13923081 has 6 divisors (see below), whose sum is σ = 20111130. Its totient is φ = 9282048.

The previous prime is 13923079. The next prime is 13923083. The reversal of 13923081 is 18032931.

It is an interprime number because it is at equal distance from previous prime (13923079) and next prime (13923083).

It can be written as a sum of positive squares in only one way, i.e., 13838400 + 84681 = 3720^2 + 291^2 .

It is not a de Polignac number, because 13923081 - 2¹ = 13923079 is a prime.

It is a super-2 number, since 2×13923081² = 387704369065122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13923083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 773496 + ... + 773513.

It is an arithmetic number, because the mean of its divisors is an integer number (3351855).

Almost surely, 2^13923081 is an apocalyptic number.

It is an amenable number.

13923081 is a deficient number, since it is larger than the sum of its proper divisors (6188049).

13923081 is a wasteful number, since it uses less digits than its factorization.

13923081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547015 (or 1547012 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 13923081 is about 3731.3644957308. The cubic root of 13923081 is about 240.5720209669.

It can be divided in two parts, 139 and 23081, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 13923081 in words is "thirteen million, nine hundred twenty-three thousand, eighty-one".