31304423 has 2 divisors, whose sum is σ = 31304424. Its totient is φ = 31304422.

The previous prime is 31304417. The next prime is 31304437. The reversal of 31304423 is 32440313.

It is a weak prime.

It is an emirp because it is prime and its reverse (32440313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31304423 - 2¹² = 31300327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31304395 and 31304404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31304323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15652211 + 15652212.

It is an arithmetic number, because the mean of its divisors is an integer number (15652212).

Almost surely, 2^31304423 is an apocalyptic number.

31304423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31304423 is an equidigital number, since it uses as much as digits as its factorization.

31304423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 31304423 is about 5595.0355673579. The cubic root of 31304423 is about 315.1630062519.

Adding to 31304423 its reverse (32440313), we get a palindrome (63744736).

The spelling of 31304423 in words is "thirty-one million, three hundred four thousand, four hundred twenty-three".