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BaseRepresentation
bin10011011110111001
311001110121
4103132321
510023201
61413241
7451441
oct233671
9131417
1079801
1154a57
123a221
132a427
1421121
15189a1
hex137b9

79801 has 2 divisors, whose sum is σ = 79802. Its totient is φ = 79800.

The previous prime is 79777. The next prime is 79811. The reversal of 79801 is 10897.

Subtracting from 79801 its product of nonzero digits (504), we obtain a palindrome (79297).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57600 + 22201 = 240^2 + 149^2 .

It is a cyclic number.

It is not a de Polignac number, because 79801 - 25 = 79769 is a prime.

It is a pancake number, because a pancake can be divided into 79801 parts by 399 straight cuts.

It is not a weakly prime, because it can be changed into another prime (79811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39900 + 39901.

It is an arithmetic number, because the mean of its divisors is an integer number (39901).

279801 is an apocalyptic number.

It is an amenable number.

79801 is a deficient number, since it is larger than the sum of its proper divisors (1).

79801 is an equidigital number, since it uses as much as digits as its factorization.

79801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 79801 is about 282.4907078118. The cubic root of 79801 is about 43.0529364268.

The spelling of 79801 in words is "seventy-nine thousand, eight hundred one".