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31069 is a prime number
BaseRepresentation
bin111100101011101
31120121201
413211131
51443234
6355501
7156403
oct74535
946551
1031069
1121385
1215b91
13111ac
14b473
159314
hex795d

31069 has 2 divisors, whose sum is σ = 31070. Its totient is φ = 31068.

The previous prime is 31063. The next prime is 31079. The reversal of 31069 is 96013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27225 + 3844 = 165^2 + 62^2 .

It is an emirp because it is prime and its reverse (96013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31069 - 27 = 30941 is a prime.

It is a super-2 number, since 2×310692 = 1930565522, which contains 22 as substring.

It is a Chen prime.

31069 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15534 + 15535.

It is an arithmetic number, because the mean of its divisors is an integer number (15535).

231069 is an apocalyptic number.

It is an amenable number.

31069 is a deficient number, since it is larger than the sum of its proper divisors (1).

31069 is an equidigital number, since it uses as much as digits as its factorization.

31069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 31069 is about 176.2640065357. The cubic root of 31069 is about 31.4370962707.

The spelling of 31069 in words is "thirty-one thousand, sixty-nine".