81035769 has 8 divisors (see below), whose sum is σ = 108512352. Its totient is φ = 53791520.

The previous prime is 81035743. The next prime is 81035771. The reversal of 81035769 is 96753018.

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 81035769 - 2¹⁵ = 81003001 is a prime.

It is a super-2 number, since 2×81035769² = 13133591714842722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81035729) 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, 57267 + ... + 58664.

It is an arithmetic number, because the mean of its divisors is an integer number (13564044).

Almost surely, 2^81035769 is an apocalyptic number.

It is an amenable number.

81035769 is a deficient number, since it is larger than the sum of its proper divisors (27476583).

81035769 is a wasteful number, since it uses less digits than its factorization.

81035769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116167.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 81035769 is about 9001.9869473356. The cubic root of 81035769 is about 432.7385503924.

The spelling of 81035769 in words is "eighty-one million, thirty-five thousand, seven hundred sixty-nine".