31169423 has 2 divisors, whose sum is σ = 31169424. Its totient is φ = 31169422.

The previous prime is 31169417. The next prime is 31169447. The reversal of 31169423 is 32496113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31169423 - 2¹⁶ = 31103887 is a prime.

It is equal to p_1925741 and since 31169423 and 1925741 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31169323) 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, 15584711 + 15584712.

It is an arithmetic number, because the mean of its divisors is an integer number (15584712).

Almost surely, 2^31169423 is an apocalyptic number.

31169423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31169423 is an equidigital number, since it uses as much as digits as its factorization.

31169423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 31169423 is about 5582.9582660092. The cubic root of 31169423 is about 314.7093077019.

The spelling of 31169423 in words is "thirty-one million, one hundred sixty-nine thousand, four hundred twenty-three".