81033837 has 8 divisors (see below), whose sum is σ = 108649440. Its totient is φ = 53720400.

The previous prime is 81033833. The next prime is 81033847. The reversal of 81033837 is 73833018.

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

It is not a de Polignac number, because 81033837 - 2² = 81033833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81033798 and 81033807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81033833) 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, 74914 + ... + 75987.

It is an arithmetic number, because the mean of its divisors is an integer number (13581180).

Almost surely, 2^81033837 is an apocalyptic number.

It is an amenable number.

81033837 is a deficient number, since it is larger than the sum of its proper divisors (27615603).

81033837 is a wasteful number, since it uses less digits than its factorization.

81033837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151083.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 81033837 is about 9001.8796370536. The cubic root of 81033837 is about 432.7351113451.

The spelling of 81033837 in words is "eighty-one million, thirty-three thousand, eight hundred thirty-seven".