42073091 has 2 divisors, whose sum is σ = 42073092. Its totient is φ = 42073090.

The previous prime is 42073027. The next prime is 42073117. The reversal of 42073091 is 19037024.

It is an a-pointer prime, because the next prime (42073117) can be obtained adding 42073091 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42073091 - 2⁶ = 42073027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42073091.

It is not a weakly prime, because it can be changed into another prime (42073991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21036545 + 21036546.

It is an arithmetic number, because the mean of its divisors is an integer number (21036546).

Almost surely, 2^42073091 is an apocalyptic number.

42073091 is a deficient number, since it is larger than the sum of its proper divisors (1).

42073091 is an equidigital number, since it uses as much as digits as its factorization.

42073091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 42073091 is about 6486.3773402416. The cubic root of 42073091 is about 347.8041875245.

The spelling of 42073091 in words is "forty-two million, seventy-three thousand, ninety-one".