31041689 has 4 divisors (see below), whose sum is σ = 35476224. Its totient is φ = 26607156.

The previous prime is 31041613. The next prime is 31041733. The reversal of 31041689 is 98614013.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98614013 = 1367 ⋅72139.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31041689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31041089) 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 3 ways as a sum of consecutive naturals, for example, 2217257 + ... + 2217270.

It is an arithmetic number, because the mean of its divisors is an integer number (8869056).

Almost surely, 2^31041689 is an apocalyptic number.

It is an amenable number.

31041689 is a deficient number, since it is larger than the sum of its proper divisors (4434535).

31041689 is an equidigital number, since it uses as much as digits as its factorization.

31041689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434534.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 31041689 is about 5571.5068877280. The cubic root of 31041689 is about 314.2788204607.

The spelling of 31041689 in words is "thirty-one million, forty-one thousand, six hundred eighty-nine".