31141989 has 10 divisors (see below), whose sum is σ = 46520870. Its totient is φ = 20761272.

The previous prime is 31141987. The next prime is 31141991. The reversal of 31141989 is 98914113.

It is an interprime number because it is at equal distance from previous prime (31141987) and next prime (31141991).

It can be written as a sum of positive squares in only one way, i.e., 23357889 + 7784100 = 4833^2 + 2790^2 .

It is not a de Polignac number, because 31141989 - 2¹ = 31141987 is a prime.

It is a super-3 number, since 3×31141989³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31141987) 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 in 9 ways as a sum of consecutive naturals, for example, 192154 + ... + 192315.

It is an arithmetic number, because the mean of its divisors is an integer number (4652087).

Almost surely, 2^31141989 is an apocalyptic number.

It is an amenable number.

31141989 is a deficient number, since it is larger than the sum of its proper divisors (15378881).

31141989 is an equidigital number, since it uses as much as digits as its factorization.

31141989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384481 (or 384472 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 31141989 is about 5580.5007839799. The cubic root of 31141989 is about 314.6169493523.

The spelling of 31141989 in words is "thirty-one million, one hundred forty-one thousand, nine hundred eighty-nine".