81469653 has 8 divisors (see below), whose sum is σ = 109419648. Its totient is φ = 53916384.

The previous prime is 81469637. The next prime is 81469667. The reversal of 81469653 is 35696418.

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

It is not a de Polignac number, because 81469653 - 2⁴ = 81469637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81469673) 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, 98701 + ... + 99522.

It is an arithmetic number, because the mean of its divisors is an integer number (13677456).

Almost surely, 2^81469653 is an apocalyptic number.

It is an amenable number.

81469653 is a deficient number, since it is larger than the sum of its proper divisors (27949995).

81469653 is a wasteful number, since it uses less digits than its factorization.

81469653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198363.

The product of its digits is 155520, while the sum is 42.

The square root of 81469653 is about 9026.0541212647. The cubic root of 81469653 is about 433.5095030570.

The spelling of 81469653 in words is "eighty-one million, four hundred sixty-nine thousand, six hundred fifty-three".