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BaseRepresentation
bin1001111011111001
32001211022
421323321
52300242
6512225
7226436
oct117371
961738
1040697
1128638
121b675
13156a7
1410b8d
15c0d2
hex9ef9

40697 has 2 divisors, whose sum is σ = 40698. Its totient is φ = 40696.

The previous prime is 40693. The next prime is 40699. The reversal of 40697 is 79604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22201 + 18496 = 149^2 + 136^2 .

It is a cyclic number.

It is not a de Polignac number, because 40697 - 22 = 40693 is a prime.

Together with 40699, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 40697.

It is not a weakly prime, because it can be changed into another prime (40693) 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, 20348 + 20349.

It is an arithmetic number, because the mean of its divisors is an integer number (20349).

240697 is an apocalyptic number.

It is an amenable number.

40697 is a deficient number, since it is larger than the sum of its proper divisors (1).

40697 is an equidigital number, since it uses as much as digits as its factorization.

40697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 40697 is about 201.7349746573. The cubic root of 40697 is about 34.3970184003.

It can be divided in two parts, 40 and 697, that added together give a palindrome (737).

The spelling of 40697 in words is "forty thousand, six hundred ninety-seven".