81460869 has 16 divisors (see below), whose sum is σ = 124391040. Its totient is φ = 46451520.

The previous prime is 81460859. The next prime is 81460903. The reversal of 81460869 is 96806418.

It is not a de Polignac number, because 81460869 - 2⁴ = 81460853 is a prime.

It is a super-2 number, since 2×81460869² = 13271746356470322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81460869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81460829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6879 + ... + 14499.

It is an arithmetic number, because the mean of its divisors is an integer number (7774440).

Almost surely, 2^81460869 is an apocalyptic number.

It is an amenable number.

81460869 is a deficient number, since it is larger than the sum of its proper divisors (42930171).

81460869 is a wasteful number, since it uses less digits than its factorization.

81460869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8140.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 81460869 is about 9025.5675167825. The cubic root of 81460869 is about 433.4939222683.

The spelling of 81460869 in words is "eighty-one million, four hundred sixty thousand, eight hundred sixty-nine".