81037113 has 8 divisors (see below), whose sum is σ = 114405408. Its totient is φ = 50846784.

The previous prime is 81037091. The next prime is 81037153. The reversal of 81037113 is 31173018.

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

It is not a de Polignac number, because 81037113 - 2²⁶ = 13928249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81037153) 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 7 ways as a sum of consecutive naturals, for example, 794431 + ... + 794532.

It is an arithmetic number, because the mean of its divisors is an integer number (14300676).

Almost surely, 2^81037113 is an apocalyptic number.

It is an amenable number.

81037113 is a deficient number, since it is larger than the sum of its proper divisors (33368295).

81037113 is a wasteful number, since it uses less digits than its factorization.

81037113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588983.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 81037113 is about 9002.0615972121. The cubic root of 81037113 is about 432.7409427409.

The spelling of 81037113 in words is "eighty-one million, thirty-seven thousand, one hundred thirteen".