8013681 has 48 divisors (see below), whose sum is σ = 13753600. Its totient is φ = 4582656.

The previous prime is 8013679. The next prime is 8013689. The reversal of 8013681 is 1863108.

It is not a de Polignac number, because 8013681 - 2¹ = 8013679 is a prime.

It is a super-2 number, since 2×8013681² = 128438166339522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8013689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101400 + ... + 101478.

Almost surely, 2^8013681 is an apocalyptic number.

It is an amenable number.

8013681 is a deficient number, since it is larger than the sum of its proper divisors (5739919).

8013681 is a wasteful number, since it uses less digits than its factorization.

8013681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 8013681 is about 2830.8445736211. The cubic root of 8013681 is about 200.1139434055.

Adding to 8013681 its reverse (1863108), we get a palindrome (9876789).

The spelling of 8013681 in words is "eight million, thirteen thousand, six hundred eighty-one".