81238883 has 8 divisors (see below), whose sum is σ = 88766256. Its totient is φ = 73735200.

The previous prime is 81238873. The next prime is 81238891. The reversal of 81238883 is 38883218.

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

It is not a de Polignac number, because 81238883 - 2⁶ = 81238819 is a prime.

It is a super-2 number, since 2×81238883² = 13199512222175378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81238883.

It is not an unprimeable number, because it can be changed into a prime (81238873) 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, 1685 + ... + 12857.

It is an arithmetic number, because the mean of its divisors is an integer number (11095782).

Almost surely, 2^81238883 is an apocalyptic number.

81238883 is a deficient number, since it is larger than the sum of its proper divisors (7527373).

81238883 is a wasteful number, since it uses less digits than its factorization.

81238883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11845.

The product of its digits is 73728, while the sum is 41.

The square root of 81238883 is about 9013.2615073568. The cubic root of 81238883 is about 433.0997979640.

The spelling of 81238883 in words is "eighty-one million, two hundred thirty-eight thousand, eight hundred eighty-three".