81695033 has 4 divisors (see below), whose sum is σ = 93365760. Its totient is φ = 70024308.

The previous prime is 81695023. The next prime is 81695069. The reversal of 81695033 is 33059618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81695033 - 2¹⁶ = 81629497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81694984 and 81695002.

It is not an unprimeable number, because it can be changed into a prime (81695023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5835353 + ... + 5835366.

It is an arithmetic number, because the mean of its divisors is an integer number (23341440).

Almost surely, 2^81695033 is an apocalyptic number.

It is an amenable number.

81695033 is a deficient number, since it is larger than the sum of its proper divisors (11670727).

81695033 is a wasteful number, since it uses less digits than its factorization.

81695033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11670726.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 81695033 is about 9038.5304668403. The cubic root of 81695033 is about 433.9088927235.

The spelling of 81695033 in words is "eighty-one million, six hundred ninety-five thousand, thirty-three".