81434269 has 8 divisors (see below), whose sum is σ = 93139200. Its totient is φ = 69747216.

The previous prime is 81434263. The next prime is 81434273. The reversal of 81434269 is 96243418.

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

It is not a de Polignac number, because 81434269 - 2¹⁵ = 81401501 is a prime.

It is a super-2 number, since 2×81434269² = 13263080335128722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81434263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7407 + ... + 14755.

It is an arithmetic number, because the mean of its divisors is an integer number (11642400).

Almost surely, 2^81434269 is an apocalyptic number.

It is an amenable number.

81434269 is a deficient number, since it is larger than the sum of its proper divisors (11704931).

81434269 is a wasteful number, since it uses less digits than its factorization.

81434269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8939.

The product of its digits is 41472, while the sum is 37.

The square root of 81434269 is about 9024.0938049202. The cubic root of 81434269 is about 433.4467331750.

The spelling of 81434269 in words is "eighty-one million, four hundred thirty-four thousand, two hundred sixty-nine".