81469134 has 24 divisors (see below), whose sum is σ = 186900480. Its totient is φ = 25558848.

The previous prime is 81469127. The next prime is 81469139. The reversal of 81469134 is 43196418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81469139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132814 + ... + 133425.

It is an arithmetic number, because the mean of its divisors is an integer number (7787520).

Almost surely, 2^81469134 is an apocalyptic number.

81469134 is an abundant number, since it is smaller than the sum of its proper divisors (105431346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81469134 is a wasteful number, since it uses less digits than its factorization.

81469134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266264 (or 266261 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 81469134 is about 9026.0253711144. The cubic root of 81469134 is about 433.5085825019.

The spelling of 81469134 in words is "eighty-one million, four hundred sixty-nine thousand, one hundred thirty-four".