81048369 has 4 divisors (see below), whose sum is σ = 108064496. Its totient is φ = 54032244.

The previous prime is 81048313. The next prime is 81048437. The reversal of 81048369 is 96384018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 81048369 - 2²¹ = 78951217 is a prime.

It is a super-2 number, since 2×81048369² = 13137676235120322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81048169) 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 3 ways as a sum of consecutive naturals, for example, 13508059 + ... + 13508064.

It is an arithmetic number, because the mean of its divisors is an integer number (27016124).

Almost surely, 2^81048369 is an apocalyptic number.

It is an amenable number.

81048369 is a deficient number, since it is larger than the sum of its proper divisors (27016127).

81048369 is a wasteful number, since it uses less digits than its factorization.

81048369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27016126.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 81048369 is about 9002.6867656272. The cubic root of 81048369 is about 432.7609776211.

The spelling of 81048369 in words is "eighty-one million, forty-eight thousand, three hundred sixty-nine".