81469395 has 112 divisors (see below), whose sum is σ = 174600192. Its totient is φ = 35691840.

The previous prime is 81469393. The next prime is 81469411. The reversal of 81469395 is 59396418.

It is a happy number.

It is not a de Polignac number, because 81469395 - 2¹ = 81469393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 81469395.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81469393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 790914 + ... + 791016.

Almost surely, 2^81469395 is an apocalyptic number.

81469395 is an abundant number, since it is smaller than the sum of its proper divisors (93130797).

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

81469395 is a wasteful number, since it uses less digits than its factorization.

81469395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 149 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 81469395 is about 9026.0398292939. The cubic root of 81469395 is about 433.5090454405.

The spelling of 81469395 in words is "eighty-one million, four hundred sixty-nine thousand, three hundred ninety-five".