81048499 has 8 divisors (see below), whose sum is σ = 94517600. Its totient is φ = 69469848.

The previous prime is 81048497. The next prime is 81048551. The reversal of 81048499 is 99484018.

It is not a de Polignac number, because 81048499 - 2¹ = 81048497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81048497) 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, 117804 + ... + 118489.

It is an arithmetic number, because the mean of its divisors is an integer number (11814700).

Almost surely, 2^81048499 is an apocalyptic number.

81048499 is a deficient number, since it is larger than the sum of its proper divisors (13469101).

81048499 is an equidigital number, since it uses as much as digits as its factorization.

81048499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236314 (or 236300 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 81048499 is about 9002.6939856912. The cubic root of 81048499 is about 432.7612090010.

The spelling of 81048499 in words is "eighty-one million, forty-eight thousand, four hundred ninety-nine".