31475669 has 2 divisors, whose sum is σ = 31475670. Its totient is φ = 31475668.

The previous prime is 31475623. The next prime is 31475677. The reversal of 31475669 is 96657413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20340100 + 11135569 = 4510^2 + 3337^2 .

It is a cyclic number.

It is not a de Polignac number, because 31475669 - 2¹⁶ = 31410133 is a prime.

It is a super-2 number, since 2×31475669² = 1981435477995122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31475069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15737834 + 15737835.

It is an arithmetic number, because the mean of its divisors is an integer number (15737835).

Almost surely, 2^31475669 is an apocalyptic number.

It is an amenable number.

31475669 is a deficient number, since it is larger than the sum of its proper divisors (1).

31475669 is an equidigital number, since it uses as much as digits as its factorization.

31475669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 31475669 is about 5610.3180836740. The cubic root of 31475669 is about 315.7366449985.

The spelling of 31475669 in words is "thirty-one million, four hundred seventy-five thousand, six hundred sixty-nine".