81314833 has 2 divisors, whose sum is σ = 81314834. Its totient is φ = 81314832.

The previous prime is 81314801. The next prime is 81314837. The reversal of 81314833 is 33841318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46881409 + 34433424 = 6847^2 + 5868^2 .

It is a cyclic number.

It is not a de Polignac number, because 81314833 - 2⁵ = 81314801 is a prime.

It is a super-2 number, since 2×81314833² = 13224204131635778, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81314795 and 81314804.

It is not a weakly prime, because it can be changed into another prime (81314837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40657416 + 40657417.

It is an arithmetic number, because the mean of its divisors is an integer number (40657417).

Almost surely, 2^81314833 is an apocalyptic number.

It is an amenable number.

81314833 is a deficient number, since it is larger than the sum of its proper divisors (1).

81314833 is an equidigital number, since it uses as much as digits as its factorization.

81314833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 81314833 is about 9017.4737593186. The cubic root of 81314833 is about 433.2347238474.

The spelling of 81314833 in words is "eighty-one million, three hundred fourteen thousand, eight hundred thirty-three".