81113701 has 8 divisors (see below), whose sum is σ = 83879424. Its totient is φ = 78357360.

The previous prime is 81113693. The next prime is 81113707. The reversal of 81113701 is 10731118.

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 81113701 - 2³ = 81113693 is a prime.

It is a super-3 number, since 3×81113701³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81113707) 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, 18240 + ... + 22246.

It is an arithmetic number, because the mean of its divisors is an integer number (10484928).

Almost surely, 2^81113701 is an apocalyptic number.

It is an amenable number.

81113701 is a deficient number, since it is larger than the sum of its proper divisors (2765723).

81113701 is a wasteful number, since it uses less digits than its factorization.

81113701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 81113701 is about 9006.3145070556. The cubic root of 81113701 is about 432.8772273251.

Adding to 81113701 its reverse (10731118), we get a palindrome (91844819).

The spelling of 81113701 in words is "eighty-one million, one hundred thirteen thousand, seven hundred one".