81492803 has 8 divisors (see below), whose sum is σ = 94257408. Its totient is φ = 69008904.

The previous prime is 81492799. The next prime is 81492821. The reversal of 81492803 is 30829418.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81492803 - 2² = 81492799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81492823) 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, 69551 + ... + 70712.

It is an arithmetic number, because the mean of its divisors is an integer number (11782176).

Almost surely, 2^81492803 is an apocalyptic number.

81492803 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

81492803 is a deficient number, since it is larger than the sum of its proper divisors (12764605).

81492803 is a wasteful number, since it uses less digits than its factorization.

81492803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140353.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 81492803 is about 9027.3364288698. The cubic root of 81492803 is about 433.5505604496.

The spelling of 81492803 in words is "eighty-one million, four hundred ninety-two thousand, eight hundred three".