31078423 has 2 divisors, whose sum is σ = 31078424. Its totient is φ = 31078422.

The previous prime is 31078403. The next prime is 31078441. The reversal of 31078423 is 32487013.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31078423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31078391 and 31078400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31078403) 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, 15539211 + 15539212.

It is an arithmetic number, because the mean of its divisors is an integer number (15539212).

Almost surely, 2^31078423 is an apocalyptic number.

31078423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31078423 is an equidigital number, since it uses as much as digits as its factorization.

31078423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 31078423 is about 5574.8025077127. The cubic root of 31078423 is about 314.4027416308.

The spelling of 31078423 in words is "thirty-one million, seventy-eight thousand, four hundred twenty-three".