Search a number
BaseRepresentation
bin111101011101101
31121011112
413223231
52001334
6401405
7160514
oct75355
947145
1031469
1121709
1216265
1311429
14b67b
1594ce
hex7aed

31469 has 2 divisors, whose sum is σ = 31470. Its totient is φ = 31468.

The previous prime is 31397. The next prime is 31477. The reversal of 31469 is 96413.

It can be divided in two parts, 314 and 69, that added together give a palindrome (383).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26569 + 4900 = 163^2 + 70^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-31469 is a prime.

It is a super-2 number, since 2×314692 = 1980595922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31469.

It is not a weakly prime, because it can be changed into another prime (31489) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15734 + 15735.

It is an arithmetic number, because the mean of its divisors is an integer number (15735).

231469 is an apocalyptic number.

It is an amenable number.

31469 is a deficient number, since it is larger than the sum of its proper divisors (1).

31469 is an equidigital number, since it uses as much as digits as its factorization.

31469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 31469 is about 177.3950393895. The cubic root of 31469 is about 31.5714344213.

The spelling of 31469 in words is "thirty-one thousand, four hundred sixty-nine".