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88981 = 101881
BaseRepresentation
bin10101101110010101
311112001121
4111232111
510321411
61523541
7520264
oct255625
9145047
1088981
1160942
12435b1
1331669
14245db
151b571
hex15b95

88981 has 4 divisors (see below), whose sum is σ = 89964. Its totient is φ = 88000.

The previous prime is 88969. The next prime is 88993. The reversal of 88981 is 18988.

88981 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (88969) and next prime (88993).

It can be written as a sum of positive squares in 2 ways, for example, as 54756 + 34225 = 234^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 88981 - 27 = 88853 is a prime.

It is a super-2 number, since 2×889812 = 15835236722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340 + ... + 541.

It is an arithmetic number, because the mean of its divisors is an integer number (22491).

288981 is an apocalyptic number.

It is an amenable number.

88981 is a deficient number, since it is larger than the sum of its proper divisors (983).

88981 is a wasteful number, since it uses less digits than its factorization.

88981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982.

The product of its digits is 4608, while the sum is 34.

The square root of 88981 is about 298.2968320315. The cubic root of 88981 is about 44.6442735703.

The spelling of 88981 in words is "eighty-eight thousand, nine hundred eighty-one".

Divisors: 1 101 881 88981