42891293 has 2 divisors, whose sum is σ = 42891294. Its totient is φ = 42891292.

The previous prime is 42891287. The next prime is 42891347. The reversal of 42891293 is 39219824.

42891293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32924644 + 9966649 = 5738^2 + 3157^2 .

It is a cyclic number.

It is not a de Polignac number, because 42891293 - 2⁶ = 42891229 is a prime.

It is equal to p_2598392 and since 42891293 and 2598392 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 (42891263) 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, 21445646 + 21445647.

It is an arithmetic number, because the mean of its divisors is an integer number (21445647).

Almost surely, 2^42891293 is an apocalyptic number.

It is an amenable number.

42891293 is a deficient number, since it is larger than the sum of its proper divisors (1).

42891293 is an equidigital number, since it uses as much as digits as its factorization.

42891293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 42891293 is about 6549.1444479413. The cubic root of 42891293 is about 350.0443290792.

The spelling of 42891293 in words is "forty-two million, eight hundred ninety-one thousand, two hundred ninety-three".